L  search
L chondrites  search
BTmeteorites
 .stony meteorites
 ..chondrites
 ...L chondrites
NTBarwell Meteorite
 Bjurbole Meteorite
 Bruderheim Meteorite
 Hedjaz Meteorite
 Rio Negro Meteorite
 Tsarev Meteorite
UFL-group chondrites
SNAdded to Thesaurus in 1981.
L waves  search
USEsurface waves
L'Assomption County Quebec  search
BTCanada
 .Eastern Canada
 ..Quebec
 ...L'Assomption County Quebec
L'Islet County Quebec  search
BTCanada
 .Eastern Canada
 ..Quebec
 ...L'Islet County Quebec
L'vov Ukraine  search
USELvov Ukraine
L'vov Volyn Basin  search
USELvov-Volyn Basin
L-group chondrites  search
USEL chondrites
La  search
USElanthanum
La Brea tar pits  search
USERancho La Brea
La Caridad Spain  search
BTEurope
 .Southern Europe
 ..Iberian Peninsula
 ...Spain
 ....Asturias Spain
 .....La Caridad Spain
SNSettlement in NW central Spain.
La Coruna City Spain  search
BTEurope
 .Southern Europe
 ..Iberian Peninsula
 ...Spain
 ....Galicia Spain
 .....La Coruna Spain
 ......La Coruna City Spain
SNRefers to only the city in extreme NW Spain on the Atlantic Ocean. Before 1993, also search La Coruna Spain.
La Coruna Spain  search
BTEurope
 .Southern Europe
 ..Iberian Peninsula
 ...Spain
 ....Galicia Spain
 .....La Coruna Spain
NTCabo Ortegal
 La Coruna City Spain
 Santiago de Compostela Spain
RTArosa Bay
SNRefers only to the province in extreme NW Spain. From 1981-1992, also search La Coruna Province and Spain. For the city, see La Coruna City Spain.
La Crosse County Wisconsin  search
BTUnited States
 .Wisconsin
 ..La Crosse County Wisconsin
La Grande Soufriere  search
BTCaribbean region
 .West Indies
 ..Antilles
 ...Lesser Antilles
 ....Guadeloupe
 .....La Grande Soufriere
RTvolcanoes
 Leeward Islands
 Soufriere
SNVolcano. Before 1981, also search Soufriere AND Guadeloupe. Indexed with Leeward Islands. Added to Thesaurus in 1981.
La Habana Cuba  search
BTCaribbean region
 .West Indies
 ..Antilles
 ...Greater Antilles
 ....Cuba
 .....La Habana Cuba
SNProvince in W Cuba. Before 1981, also search Havana Cuba.
La Jolla California  search
BTUnited States
 .California
 ..San Diego County California
 ...La Jolla California
RTSan Diego California
SNNW section of San Diego in San Diego County.
La Ligua  search
SNNo longer a valid term for GeoRef. See La Ligua River or La Ligua Chile for the town. Also used for a former department of Aconcagua, now Valparaiso Chile.
La Ligua Chile  search
BTSouth America
 .Chile
 ..Valparaiso Chile
 ...La Ligua Chile
SNTown in central Chile. In former Aconcagua Province.
La Ligua River  search
BTSouth America
 .Chile
 ..Valparaiso Chile
 ...La Ligua River
SNRiver in central Chile. Added to Thesaurus in 1995.
La Luna Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Upper Cretaceous
 .....La Luna Formation
RTColombia
 Venezuela
SNN Colombia, W Venezuela. Divided into Salada, Pujamana and Galembo members. Added to Thesaurus in 1989.
La Meseta Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Eocene
 .....upper Eocene
 ......La Meseta Formation
RTAntarctica
 Seymour Island
SNSeymour Island, Antarctica. Added to Thesaurus in 1989.
La Palma  search
RTCanary Islands
SNNW island, at N28#DG25'N28#DG50' W017#DG45'W018#DG, Canary Islands. May also occur in other locations. Search in combination with Canary Islands. Indexed with Canary Islands if applicable. Added to Thesaurus in 1998.
La Pampa Argentina  search
BTSouth America
 .Argentina
 ..La Pampa Argentina
RTSalado Basin
SNProvince in central Argentina.
La Paz  search
SNNo longer a valid term for GeoRef. Also occurs as towns in Argentina and Mexico and as department of El Salvador.
La Paz Bolivia  search
BTSouth America
 .Bolivia
 ..La Paz Bolivia
RTLake Titicaca
SNDepartment and city in W Bolivia.
La Paz County Arizona  search
BTUnited States
 .Arizona
 ..La Paz County Arizona
RTBuckskin Mountains
 Yuma County Arizona
 Chocolate Mountains
 Date Creek basin
SNW central Arizona. Formed from N part of Yuma County in 1983. Before 1983, also search Yuma County Arizona.
La Plata County Colorado  search
BTUnited States
 .Colorado
 ..La Plata County Colorado
RTNeedle Mountains
SNSW Colorado.
La Quinta Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Jurassic
 ....La Quinta Formation
RTMexico
 Venezuela
SNVenezuela and S Mexico. Added to Thesaurus in 1989.
La Rioja  search
SNNot a valid term for GeoRef. See La Rioja Argentina; La Rioja Spain if applicable.
La Rioja Argentina  search
BTSouth America
 .Argentina
 ..La Rioja Argentina
NTPaganzo Argentina
RTChanares Formation
 Guandacol Formation
 Pampean Mountains
 Paganzo Basin
 Salado Basin
SNProvince in NW Argentina.
La Rioja Spain  search
BTEurope
 .Southern Europe
 ..Iberian Peninsula
 ...Spain
 ....La Rioja Spain
NTLogrono City Spain
RTCastile Spain
 Old Castile Spain
 Sierra de la Demanda
SNAutonomous community and province of N central Spain. Formerly Logrono province. From 1981-1992, also search Logrono Province and Spain. Before 1998, also search Logrono Spain. For the city, see Logrono City Spain. Added to Thesaurus in 1998.
La Ronge Belt  search
USELa Ronge Domain
La Ronge Doma  search
La Ronge Domain  search
BTCanada
 .Western Canada
 ..Saskatchewan
 ...La Ronge Domain
UFLa Ronge Belt
RTgold ores
SNN central Saskatchewan. Gold ores. Added to Thesaurus in 1989.
La Ronge Saskatchewan  search
BTCanada
 .Western Canada
 ..Saskatchewan
 ...La Ronge Saskatchewan
RTLac La Ronge
SNVillage and lake in N central Saskatchewan.
La Salle County Illinois  search
BTUnited States
 .Illinois
 ..La Salle County Illinois
SNN Illinois.
La Salle County Texas  search
BTUnited States
 .Texas
 ..La Salle County Texas
SNS Texas.
La Salle Limestone  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Pennsylvanian
 .....La Salle Limestone
RTIllinois
SNMiddle and Upper Pennsylvanian. In McLeansboro Group. NE Illinois.
La Salle Parish Louisiana  search
BTUnited States
 .Louisiana
 ..La Salle Parish Louisiana
La Ventana Sandstone  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Upper Cretaceous
 .....La Ventana Sandstone
RTNew Mexico
 Mesaverde Group
SNOf Mesaverde Group. NW New Mexico.
Laacher See  search
BTEurope
 .Central Europe
 ..Germany
 ...Rhineland-Palatinate Germany
 ....Laacher See
UFLake of Laach
SNRhineland-Palatinate, W Germany. Added to Thesaurus in 1989.
Laba Basin  search
BTCommonwealth of Independent States
 .Russian Federation
 ..Krasnodar Russian Federation
 ...Laba Basin
SNRiver basin in Krasnodar Kray of the Northern Caucasus. Also search Laba. This term has multiple hierarchies.
Labelle County Quebec  search
BTCanada
 .Eastern Canada
 ..Quebec
 ...Labelle County Quebec
Labette County Kansas  search
BTUnited States
 .Kansas
 ..Labette County Kansas
SNSE Kansas.
Labette Shale  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Pennsylvanian
 .....Middle Pennsylvanian
 ......Desmoinesian
 .......Labette Shale
RTIowa
 Missouri
 Oklahoma
 Kansas
 Marmaton Group
SNIn Marmaton Group.
laboratory studie  search
laboratory studies  search
UFstudies, laboratory
RTengineering geology
 quality control
 environmental geology
 experimental studies
 models
 modern analogs
 simulation
 Rayleigh number
 settling
 sandbox models
 theoretical studies
 physical models
 Long Duration Exposure Facility
 scale models
SNGeneral term. From 1981-1997 restricted to engineering studies. Indexed with experimental studies if applicable.
Laborcita Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Laborcita Formation
RTLower Permian
 New Mexico
 Upper Pennsylvanian
 Magdalena Group
SNIn Magdalena Group. S New Mexico. Indexed with ages as applicable. Added to Thesaurus in 1989.
Labrador  search
BTCanada
 .Eastern Canada
 ..Newfoundland
 ...Labrador
NTKiglapait
 Kiglapait Intrusion
 Mistastin Lake
 Nain Massif
 Nain Newfoundland
 Torngat Mountains
 Wabush
RTSuperior Province
 Belle Isle
 Churchill Province
 Hudson Strait
 Grenville Province
 Churchill Falls
 Labrador Current
 Labrador Trough
 Nain Province
 Rae Province
 Sokoman Formation
 Torngat Orogeny
 Ungava
Labrador Basin  search
BTAtlantic Ocean
 .North Atlantic
 ..Labrador Basin
SNE of Labrador and S of Greenland.
Labrador Current  search
RTDavis Strait
 Labrador
 Labrador Sea
 Newfoundland Island
 North Atlantic
SNFormed by West Greenland Current and Baffin Island Current at Davis Strait, flows SE along coast of Labrador and Newfoundland, and meets North Atlantic Current at about N42#DG W50#DG. Indexed with oceans such as North Atlantic as applicable. Added to Thes
Labrador Sea  search
BTAtlantic Ocean
 .North Atlantic
 ..Labrador Sea
RTLeg 105
 ODP Site 646
 ODP Site 647
 Hudson Strait
 Labrador Current
 Leg 12
 DSDP Site 112
 DSDP Site 113
SNBetween Labrador and SW Greenland.
Labrador Trough  search
BTCanada
 .Labrador Trough
RTQuebec
 Labrador
SNIn Quebec and Labrador. Added to Thesaurus in 1981.
labradorite  search
BTsilicates
 .framework silicates
 ..feldspar group
 ...plagioclase
 ....labradorite
RTigneous rocks
labradoritite  search
BTigneous rocks
 .plutonic rocks
 ..gabbros
 ...labradoritite
labuntsovite  search
BTsilicates
 .orthosilicates
 ..sorosilicates
 ...labuntsovite
Labyrinthodontia  search
BTChordata
 .Vertebrata
 ..Tetrapoda
 ...Amphibia
 ....Labyrinthodontia
NTAnthracosauria
 Temnospondyli
SNSubclass.
Lac du Bonnet  search
BTCanada
 .Western Canada
 ..Manitoba
 ...Lac du Bonnet
RTLac du Bonnet Batholith
 Lac du Bonnet Manitoba
SNLake in SE Manitoba. As of 1993, use Lac du Bonnet Manitoba for the town. Added to Thesaurus in 1989.
Lac du Bonnet Batholith  search
BTCanada
 .Western Canada
 ..Manitoba
 ...Lac du Bonnet Batholith
RTLac du Bonnet
 Underground Research Laboratory
SNIntrusion; site for nuclear waste disposal management in SE Manitoba. Added to Thesaurus in 1989.
Lac du Bonnet Manitoba  search
BTCanada
 .Western Canada
 ..Manitoba
 ...Lac du Bonnet Manitoba
RTLac du Bonnet
SNTown in SE Manitoba.
Lac du Bouchet  search
BTute-Loire France
 .Lac du Bouchet
UFBouchet Lake
 Lake Bouchet
RTVelay
SNMaar lake in Velay region of Central Massif, Haute Loire, S central France. Added to Thesaurus in 1995.
Lac La Ronge  search
BTCanada
 .Western Canada
 ..Saskatchewan
 ...Lac La Ronge
UFLake La Ronge
RTLa Ronge Saskatchewan
SNLake in N central Saskatchewan.
Lac qui Parle County Minnesota  search
BTUnited States
 .Minnesota
 ..Lac qui Parle County Minnesota
Lac-Saint-Jean-Est County Quebec  search
BTCanada
 .Eastern Canada
 ..Quebec
 ...Lac-Saint-Jean-Est County Quebec
Lac-Saint-Jean-Ouest County Quebec  search
BTCanada
 .Eastern Canada
 ..Quebec
 ...Lac-Saint-Jean-Ouest County Quebec
Laccadive Islands  search
BTAsia
 .Indian Peninsula
 ..India
 ...Laccadive Islands
RTIndian Ocean Islands
SNOff SW coast of India in Lakshadweep Territory. Added to Thesaurus in 1981.
laccoliths  search
BTintrusions
 .laccoliths
UFcistern rock
RTdomes
 batholiths
 dikes
 lopoliths
Lacertilia  search
BTChordata
 .Vertebrata
 ..Tetrapoda
 ...Reptilia
 ....Diapsida
 .....Lepidosauria
 ......Squamata
 .......Lacertilia
NTMosasauridae
SNSuborder.
Lachlan fold belt  search
BTAustralasia
 .Australia
 ..Lachlan fold belt
RTQueensland Australia
 New South Wales Australia
 Tasmania Australia
 Victoria Australia
SNE Australia, from E central Queensland to NE Tasmania. Added to Thesaurus in 1981.
Lackawanna County Pennsylvania  search
BTUnited States
 .Pennsylvania
 ..Lackawanna County Pennsylvania
Laclede County Missouri  search
BTUnited States
 .Missouri
 ..Laclede County Missouri
LaCoste-Romberg gravimeters  search
BTgravimeters
 .LaCoste-Romberg gravimeters
SNAdded to Thesaurus in 1981.
lacustrine  search
SNA valid term through 1977. After 1977, use lacustrine features or (as of 1981) lacustrine environment.
lacustrine environment  search
NTfluviolacustrine environment
 glaciolacustrine environment
RTaquatic environment
 deep-water environment
 depositional environment
 ecology
 highstands
 hypersaline environment
 lacustrine features
 lacustrine sedimentation
 lake sediments
 lake-level changes
 lakes
 levels
 littoral cells
 lowstands
 meromictic lakes
 nearshore
SNAdded to Thesaurus in 1981.
lacustrine features  search
UFfeatures, lacustrine
RTgeomorphology
 fluviolacustrine environment
 lacustrine environment
 beaches
 inlets
 bedforms
 bogs
 fens
 marshes
 crater lakes
 glacial lakes
 kames
 lakes
 ephemeral lakes
 extinct lakes
 fan deltas
 ice dams
 glaciolacustrine environment
 limnology
 meromictic lakes
 mi
SNAlso search lacustrine.
lacustrine sedimentation  search
BTsedimentation
 .lacustrine sedimentation
NTfluviolacustrine sedimentation
 glaciolacustrine sedimentation
RTfluviolacustrine environment
 lacustrine environment
SNAdded to Thesaurus in 1981.
lacustrine sediments  search
USElake sediments
Ladak  search
USELadakh
Ladakh  search
BTAsia
 .Indian Peninsula
 ..Jammu and Kashmir
 ...Ladakh
UFLadak
RTIndia
 China
 Pakistan
 Indus-Yarlung Zangbo suture zone
 Karakoram
SNRegion in Jammu and Kashmir. S Ladakh divided between India and Pakistan. Indexed with India and/or Pakistan as applicable.
Ladd Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Upper Cretaceous
 .....Ladd Formation
RTCalifornia
 Holz Shale
SNS California. Includes Holz Shale and Baker Conglomerate Member. Added to Thesaurus in 1989.
Ladinian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Triassic
 ....Middle Triassic
 .....Ladinian
RTHallstatt Limestone
SNEurope: upper Middle Triassic. Above Anisian, below Carnian.
Ladner Group  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Jurassic
 ....Ladner Group
RTWashington
 British Columbia
SNS British Columbia and N Washington. Added to Thesaurus in 1989.
Ladoga Series  search
BTChronostratigraphic Units
 .Precambrian
 ..Ladoga Series
RTRussian Federation
 Finland
 Baltic Shield
 Karelia Russian Federation
SNUsed for the Precambrian metamorphic unit in the Lake Ladoga region of the Russian Federation and Finland. Not to be confused with Quaternary deposits or Cambrian-Silurian sedimentary rocks of the same name in the same region. (These units will be assigne
Laetoli  search
BTAfrica
 .East Africa
 ..Tanzania
 ...Laetoli
SNPliocene site of Tanzania. Added to Thesaurus in 1989.
Laetoli Beds  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Quarternary
 ....Pleistocene
 .....Laetoli Beds
UFLaetolil Beds
RTTanzania
SNPleistocene. Tanzania. Added to Thesaurus in 1993.
Laetolil Beds  search
USELaetoli Beds
Lafayette County Arkansas  search
BTUnited States
 .Arkansas
 ..Lafayette County Arkansas
RTWalker Creek Field
SNSW Arkansas.
Lafayette County Florida  search
BTUnited States
 .Florida
 ..Lafayette County Florida
SNBounded by Suwannee River in N Florida.
Lafayette County Mississippi  search
BTUnited States
 .Mississippi
 ..Lafayette County Mississippi
NTOxford Mississippi
SNN Mississippi.
Lafayette County Missouri  search
BTUnited States
 .Missouri
 ..Lafayette County Missouri
SNW central Missouri.
Lafayette County Wisconsin  search
BTUnited States
 .Wisconsin
 ..Lafayette County Wisconsin
SNS Wisconsin.
Lafayette Parish Louisiana  search
BTUnited States
 .Louisiana
 ..Lafayette Parish Louisiana
SNS central Louisiana.
Lafourche Parish Louisiana  search
BTUnited States
 .Louisiana
 ..Lafourche Parish Louisiana
RTBarataria Bay
SNExtreme SE Louisiana, bordering on the Gulf of Mexico.
Lagenidae  search
BTInvertebrata
 .Protista
 ..Foraminifera
 ...Rotaliina
 ....Lagenidae
RTmicrofossils
SNIndexed with microfossils if applicable.
Lageos  search
UFLaser Geodynamics Satellite
RTgeophysical methods
 geophysical surveys
 remote sensing
 satellite methods
 laser ranging
SNAdded to Thesaurus in 1985.
Lagerstaetten  search
USELagerstatten
Lagerstatten  search
UFfossil Lagerstatten
 Lagerstaetten
RTpaleontology
 morphology
 fossils
 anatomy
 fossilization
 taphonomy
 faunal studies
 floral studies
 preservation
 soft parts
SNDerived from the German for any type of deposit. As of 1998 restricted to deposits of exceptionally preserved biotas. Before 1998, also search soft parts and fossilization. Added to Thesaurus in 1998.
Laghouat  search
BTAfrica
 .North Africa
 ..Algeria
 ...Laghouat
SNOasis in N central Algeria. After 1993, use Laghouat Algeria for the town.
Lago Maggiore  search
BTEurope
 .Lago Maggiore
RTPiemonte Italy
 Lombardy Italy
 Ticino River
 Ticino Switzerland
SNLake in N Italy and S Switzerland. Indexed with countries and canton or provinces as applicable.
Lagomorpha  search
BTChordata
 .Vertebrata
 ..Tetrapoda
 ...Mammalia
 ....Theria
 .....Eutheria
 ......Lagomorpha
NTLeporidae
lagoonal  search
SNA valid term through 1977. After 1977, use lagoons or (as of 1981) lagoonal environment or lagoonal sedimentation.
lagoonal environment  search
RTaquatic environment
 deep-water environment
 depositional environment
 ecology
 hypersaline environment
 lagoonal sedimentation
 lagoons
 paleoecology
 sedimentation
SNAdded to Thesaurus in 1981.
lagoonal sedimentation  search
BTsedimentation
 .lagoonal sedimentation
RTlagoonal environment
SNAdded to Thesaurus in 1981.
lagoons  search
BTshore features
 .lagoons
RTsedimentation
 ecology
 paleoecology
 geomorphology
 lagoonal environment
 segmentation
 atolls
 reefs
 beaches
 barrier reefs
 coastal environment
 lakes
SNAs of 1981, use lagoonal environment for type of environment. Restricted to the natural feature.
Lagos Lagoon  search
BTAfrica
 .West Africa
 ..Nigeria
 ...Lagos Lagoon
SNBetween Lagos Island just off the Gulf of Guinea and the mainland. City of Lagos at W end of lagoon. Also search Lagos.
Lagrange County Indiana  search
BTIndiana
 .Lagrange County Indiana
Laguna Madre  search
RTBaffin Bay
 Gulf of Mexico
 Kenedy County Texas
 Mexico
 Padre Island
 Tamaulipas Mexico
 Texas
SNInlet of the Gulf of Mexico located between Padre Island and mainland S Texas, S of Corpus Christi. Also an inlet of the Gulf of Mexico off the coast of Tamaulipas, E Mexico. Indexed with regions as applicable. Added to Thesaurus in 1989.
lahars  search
BTmass movements
 .lahars
RTvolcanism
 geomorphology
 lava flows
 mudflows
Lahn River  search
BTEurope
 .Central Europe
 ..Germany
 ...Lahn River
RTRhineland-Palatinate Germany
 Hesse Germany
SNFlows S and SW into the Rhine River SE of Koblenz. Also search Lahn. Indexed with states as applicable.
Lahn River valley  search
BTEurope
 .Central Europe
 ..Germany
 ...Lahn River valley
RTRhineland-Palatinate Germany
 Hesse Germany
SNAlso search Lahn. Indexed with states as applicable.
laihunite  search
BTsilicates
 .orthosilicates
 ..nesosilicates
 ...laihunite
UFferrifayalite
Laisvall Sweden  search
BTEurope
 .Western Europe
 ..Scandinavia
 ...Sweden
 ....Norrbotten Sweden
 .....Laisvall Sweden
SNVillage in N Sweden.
Lak  search
Lake Agassiz  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Quarternary
 ....Pleistocene
 .....Lake Agassiz
RTNorth Dakota
 North America
 Minnesota
 Manitoba
SNGlacial lake which existed in Pleistocene Epoch. Covered parts of N central U.S. and S central Canada. Indexed with Manitoba and U.S. states as applicable.
Lake Albert  search
BTAfrica
 .East African Lakes
 ..Lake Albert
UFLake Mobutu
RTCongo Democratic Republic
 Uganda
 East African Rift
 Upper Zaire Congo Democratic Republic
SNIndexed with Uganda and/or Congo Democratic Republic as applicable.
Lake Algonquin  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Quarternary
 ....Pleistocene
 .....Lake Algonquin
RTOntario
 Wisconsin
 North America
 Minnesota
 Michigan
 Lake Superior region
SNPleistocene glacial lake. Occupied sites of modern lakes Superior, Michigan and Huron, and adjacent land areas. Indexed with Ontario and U.S. states as applicable. Added to Thesaurus in 1985.
Lake Athabasca  search
BTCanada
 .Western Canada
 ..Lake Athabasca
RTAlberta
 Saskatchewan
 Athabasca District
SNNW Saskatchewan and NE Alberta. Indexed with provinces as applicable. Added to Thesaurus in 1985.
Lake Baikal  search
BTCommonwealth of Independent States
 .Russian Federation
 ..Lake Baikal
BTAsia
 .Lake Baikal
UFBaikal (Lake)
RTIrkutsk Russian Federation
 Buryat Russian Federation
 Baikal region
 Baikal rift zone
SNLargest freshwater lake in Eurasia. Bounded on N, E, and S by the Buryatia, and on the W by Irkutsk Oblast. Also search Baikal AND lake or lakes. This term has multiple hierarchies.
Lake Balaton  search
BTszprem Hungary
 .Lake Balaton
UFBalaton (Lake)
RTBalaton region
SNW Hungary.
Lake Balkhash  search
BTCommonwealth of Independent States
 .Kazakhstan
 ..Lake Balkhash
UFBalkhash (Lake)
RTBalkhash region
SNE Kazakhstan. This term has multiple hierarchies.
Lake Baringo  search
BTAfrica
 .East African Lakes
 ..Lake Baringo
UFBaringo Lake
RTGreat Rift Valley
 Kenya
 Kenya Rift valley
SNW central Kenya, in Great Rift Valley. Added to Thesaurus in 1981.
lake biscuits  search
USEalgal biscuits
Lake Biwa  search
BTnshu
 .Shiga Japan
 ..Lake Biwa
UFBiwa Lake
 Omi (Lake)
SNW central Honshu. Also search Biwa.
Lake Bonneville  search
RTGreat Salt Lake
 Holocene
 Idaho
 Nevada
 United States
 Upper Pleistocene
 Utah
SNLarge prehistoric body of water in present Great Salt Lake area. Indexed with states and age or ages as applicable.
Lake Bonney  search
RTSouth Australia
 Taylor Valley
 Victoria Land
SNLake in SE South Australia. Also in Taylor Valley of Victoria Land, Antarctica. Indexed with location as applicable.
Lake Bouchet  search
USELac du Bouchet
Lake Chad  search
BTAfrica
 .West Africa
 ..Lake Chad
RTCameroon
 Nigeria
 Niger
 Chad Basin
 Chad
SNIndexed with countries as applicable.
Lake Champlain  search
BTNorth America
 .Lake Champlain
RTQuebec
 Vermont
 New York
 Champlain Sea
 Champlain Valley
SNBetween New York and Vermont extending into Quebec. Indexed with Quebec and states as applicable.
Lake Char Fault  search
BTUnited States
 .Lake Char Fault
RTMassachusetts
 Connecticut
 Rhode Island
SNSE New England. Indexed with states as applicable. Added to Thesaurus in 1985.
Lake Chatuge  search
BTUnited States
 .Lake Chatuge
RTNorth Carolina
 Georgia
 Clay County North Carolina
 Towns County Georgia
SNIndexed with counties as applicable.
Lake Chicago  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Quarternary
 ....Pleistocene
 .....Lake Chicago
RTUnited States
 Illinois
 Indiana
 Wisconsin
 Michigan
 Great Lakes region
SNPleistocene glacial lake in the Great Lakes region. Indexed with states as applicable. Added to Thesaurus in 1989.
Lake Como (Italy)  search
USEComo
Lake Constance  search
BTEurope
 .Central Europe
 ..Lake Constance
UFBodensee
 Constance Lake
RTSwitzerland
 Bavaria Germany
 Baden-Wurttemberg Germany
 Rhine River
 Rhine Basin
 Vorarlberg Austria
SNIndexed with countries as applicable.
Lake County California  search
BTUnited States
 .California
 ..Lake County California
RTClear Lake
SNNW California.
Lake County Colorado  search
BTUnited States
 .Colorado
 ..Lake County Colorado
NTClimax Colorado
 Leadville Colorado
 Leadville mining district
 Saint Kevin Gulch
RTClimax Mine
SNCentral Colorado.
Lake County Florida  search
BTUnited States
 .Florida
 ..Lake County Florida
SNBounded by Saint Johns River in central Florida.
Lake County Illinois  search
BTUnited States
 .Illinois
 ..Lake County Illinois
SNBounded by Lake Michigan in extreme NE Illinois.
Lake County Indiana  search
BTIndiana
 .Lake County Indiana
SNExtreme NW Indiana.
Lake County Michigan  search
BTUnited States
 .Michigan
 ..Michigan Lower Peninsula
 ...Lake County Michigan
SNW Michigan.
Lake County Minnesota  search
BTUnited States
 .Minnesota
 ..Lake County Minnesota
NTTwo Harbors Minnesota
RTVermilion Range
SNNE Minnesota.
Lake County Montana  search
BTUnited States
 .Montana
 ..Lake County Montana
RTFlathead Lake
SNNW Montana.
Lake County Ohio  search
BTUnited States
 .Ohio
 ..Lake County Ohio
SNNE Ohio.
Lake County Oregon  search
BTUnited States
 .Oregon
 ..Lake County Oregon
SNS Oregon.
Lake County South Dakota  search
BTUnited States
 .South Dakota
 ..Lake County South Dakota
SNE South Dakota.
Lake County Tennessee  search
BTUnited States
 .Tennessee
 ..Lake County Tennessee
RTReelfoot Lake
SNExtreme NW Tennessee.
Lake District  search
UFEnglish Lake District
RTCumbria England
 Cumberland England
 Worcestershire England
 Westmorland England
SNMountain and lake region in Cumbria, NW England. Until 1975, parts were included in Lancashire, Cumberland, and Westmorland counties. Indexed with England and counties as applicable.
Lake Edward  search
BTAfrica
 .East African Lakes
 ..Lake Edward
RTCongo Democratic Republic
 Uganda
 East African Rift
SNS of Lake Albert. Indexed with countries as applicable.
Lake Erie  search
BTNorth America
 .Great Lakes
 ..Lake Erie
RTOntario
 Ohio
 Pennsylvania
 New York
 Michigan
 Detroit River
SNIndexed with Ontario and states as applicable.
Lake Eyre  search
BTAustralasia
 .Australia
 ..South Australia
 ...Lake Eyre
SNNE South Australia.
Lake Frome  search
BTAustralasia
 .Australia
 ..South Australia
 ...Lake Frome
SNE South Australia. Added to Thesaurus in 1989.
Lake Geneva  search
BTEurope
 .Lake Geneva
UFLake Leman
 Leman Lake
RTHaute-Savoie France
 Valais Switzerland
 Geneva Switzerland
 Vaud Switzerland
 Rhone River
 Rhone Valley
SNIndexed with countries as applicable.
Lake George  search
RTEssex County New York
 New York
 Washington County New York
 Warren County New York
SNNE New York. Indexed with counties or regions as applicable.
Lake Gosiute  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Eocene
 .....Lake Gosiute
RTGreen River Formation
 Sweetwater County Wyoming
SNEocene lake in SW Wyoming. Added to Thesaurus in 1981.
Lake Huron  search
BTNorth America
 .Great Lakes
 ..Lake Huron
RTOntario
 Michigan
 Georgian Bay
 Manitoulin Island
SNIndexed with Michigan and/or Ontario.
Lake Iroquois  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Quarternary
 ....Pleistocene
 .....Upper Pleistocene
 ......Lake Iroquois
RTCanada
 Ontario
 United States
 New York
 Great Lakes region
 Lake Ontario
SNGlacial lake which existed in the Lake Ontario basin and adjacent area. Indexed with Lake Ontario and/or Ontario and U.S. states as applicable.
Lake Jocassee  search
BTUnited States
 .South Carolina
 ..Lake Jocassee
RTOconee County South Carolina
 Pickens County South Carolina
SNReservoir on Keowee River, NW South Carolina, near Seneca. Indexed with counties as applicable. Added to Thesaurus in 1981.
Lake Kariba  search
BTAfrica
 .East African Lakes
 ..Lake Kariba
UFKariba Lake
RTZambezi Valley
 Zimbabwe
 Zambia
SNFormed by dam in Kariba Gorge of Zambezi River. Indexed with countries as applicable.
Lake Kinneret  search
USESea of Galilee
Lake Kivu  search
BTAfrica
 .Central Africa
 ..Lake Kivu
BTAfrica
 .East African Lakes
 ..Lake Kivu
RTCongo Democratic Republic
 East African Rift
 Rwanda
 Kivu Congo Democratic Republic
SNThis term has multiple hierarchies. Indexed with countries as applicable.
Lake La Ronge  search
USELac La Ronge
Lake Ladoga  search
BTCommonwealth of Independent States
 .Russian Federation
 ..Lake Ladoga
BTEurope
 .Lake Ladoga
SNE and NE of Saint Petersburg. This term has multiple hierarchies.
Lake Ladoga region  search
BTEurope
 .Lake Ladoga region
RTRussian Federation
 Finland
 Baltic Shield
 Karelia Russian Federation
 Eastern Finland Province
 Karelia
SNRegion surrounding Lake Ladoga, extending into Finland. Indexed with countries as applicable. Added to Thesaurus in 1981.
Lake Lahontan  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Quarternary
 ....Pleistocene
 .....Lake Lahontan
RTUnited States
 California
 Nevada
 Oregon
SNExtinct lake. Occupied parts of NW Nevada, NE California and SE Oregon during Pleistocene time. Indexed with states as applicable. Added to Thesaurus in 1985.
Lake Lappajarvi  search
BTEurope
 .Western Europe
 ..Scandinavia
 ...Finland
 ....Western Finland Province
 .....Lake Lappajarvi
RTimpact features
SNSW central Finland.
Lake Leman  search
USELake Geneva
Lake Louise  search
RTAlberta
 Banff National Park
SNVillage and small lake in Banff National Park in SW Alberta. As of 1993, use Lake Louise Alberta for the village. Also in other locations. Indexed with province or regions as applicable.
Lake Magadi  search
BTAfrica
 .East African Lakes
 ..Lake Magadi
BTAfrica
 .East Africa
 ..Kenya
 ...Lake Magadi
RTEast African Rift
SNSoda lake in S central Kenya. This term has multiple hierarchies.
Lake Malawi  search
BTAfrica
 .East Africa
 ..Lake Malawi
BTAfrica
 .East African Lakes
 ..Lake Malawi
UFLake Nyasa
RTEast African Rift
 Malawi
 Mozambique
 Tanzania
SNThis term has multiple hierarchies. Indexed with countries as applicable.
Lake Maracaibo  search
BTSouth America
 .Venezuela
 ..Lake Maracaibo
RTZulia Venezuela
 Maracaibo Basin
 Trujillo Venezuela
SNLake in NW Venezuela.
Lake Matagami  search
USEMatagami
Lake Maumee  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Quarternary
 ....Pleistocene
 .....Lake Maumee
RTOntario
 Indiana
 Ohio
 North America
 Michigan
 Great Lakes region
SNPleistocene glacial lake in Ontario, Ohio, Michigan and Indiana. Indexed with states or provinces as applicable. Added to Thesaurus in 1989.
Lake Mead  search
RTArizona
 Clark County Nevada
 Lake Mead Fault
 Lost City
 Mohave County Arizona
 Nevada
 United States
SNWithin Lake Mead National Recreation Area. Indexed with states and counties as applicable.
Lake Mead Fault  search
BTUnited States
 .Nevada
 ..Lake Mead Fault
RTLake Mead
SNS Nevada. Added to Thesaurus in 1989.
Lake Mendota  search
BTUnited States
 .Wisconsin
 ..Dane County Wisconsin
 ...Lake Mendota
RTMadison Wisconsin
SNIn Dane County, S central Wisconsin.
Lake Michigan  search
BTNorth America
 .Great Lakes
 ..Lake Michigan
RTUnited States
 Illinois
 Indiana
 Wisconsin
 Michigan
 Green Bay
 Wedron Formation
SNIndexed with states as applicable.
Lake Michigan Basin  search
USEMichigan Basin
Lake Michigan Lobe  search
RTCanada
 Great Lakes region
 Illinois
 Indiana
 Laurentide ice sheet
 Michigan
 United States
 Wisconsin
SNPart of Laurentide ice sheet, Wisconsinan glaciation.
Lake Missoula  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Quarternary
 ....Pleistocene
 .....Lake Missoula
RTUnited States
 Idaho
 Montana
 Washington
 Oregon
 Channeled Scabland
SNPleistocene glacial lake in NW United States. Indexed with states as applicable. Added to Thesaurus in 1985.
Lake Mobutu  search
USELake Albert
Lake Natron  search
BTAfrica
 .East Africa
 ..Lake Natron
BTAfrica
 .East African Lakes
 ..Lake Natron
RTEast African Rift
 Kenya
 Tanzania
SNThis term has multiple hierarchies. Indexed with countries as applicable.
Lake Neusiedler  search
BTEurope
 .Central Europe
 ..Lake Neusiedler
UFFerto to
 Neusiedler Lake
 Neusiedlersee
RTAustria
 Hungary
 Burgenland Austria
SNE Austria and NW Hungary. Indexed with countries as applicable. Added to Thesaurus in 1985.
Lake Nipissing  search
BTCanada
 .Eastern Canada
 ..Ontario
 ...Nipissing District Ontario
 ....Lake Nipissing
RTCallander Bay
SNNipissing District, SE Ontario. Added to Thesaurus in 1989.
Lake Nyasa  search
USELake Malawi
Lake Nyos  search
BTAfrica
 .West Africa
 ..Cameroon
 ...Lake Nyos
UFNyos
SNVolcanic crater lake in NW Cameroon. Site of carbon dioxide outgassing natural disasters. Added to Thesaurus in 1993.
Lake of Bienne  search
USEBiel Lake
Lake of Laach  search
USELaacher See
Lake of the Woods  search
BTNorth America
 .Lake of the Woods
RTOntario
 Minnesota
 Manitoba
 Lake of the Woods region
SNNW Ontario, SE Manitoba and N Minnesota. Indexed with provinces and/or Minnesota and counties as applicable. Added to Thesaurus in 1989.
Lake of the Woods County Minnesota  search
BTUnited States
 .Minnesota
 ..Lake of the Woods County Minnesota
Lake of the Woods region  search
BTNorth America
 .Lake of the Woods region
RTOntario
 Minnesota
 Manitoba
 Lake of the Woods
SNN Minnesota, SW Ontario and SE Manitoba. Indexed with Minnesota and counties and/or Canadian provinces as applicable. Added to Thesaurus in 1985.
Lake of Zurich  search
BTEurope
 .Central Europe
 ..Switzerland
 ...Lake of Zurich
RTZurich Switzerland
SNN Switzerland.
Lake Okeechobee  search
BTUnited States
 .Florida
 ..Lake Okeechobee
SNS central Florida.
Lake Onega  search
BTCommonwealth of Independent States
 .Russian Federation
 ..Lake Onega
BTEurope
 .Lake Onega
RTKarelia Russian Federation
 Karelia
 Onega Russian Federation
SNIn Karelia Autonomous Republic. This term has multiple hierarchies.
Lake Ontario  search
BTNorth America
 .Great Lakes
 ..Lake Ontario
RTOntario
 New York
 Lake Iroquois
SNIndexed with New York and/or Ontario as applicable.
Lake Pontchartrain  search
BTUnited States
 .Louisiana
 ..Lake Pontchartrain
SNS Louisiana. Indexed with parishes as applicable.
Lake Powell  search
BTUnited States
 .Lake Powell
RTUtah
 Arizona
 Coconino County Arizona
 Garfield County Utah
 San Juan County Utah
 Glen Canyon Dam
 Kane County Utah
SNArtificial lake in S Utah and N Arizona, in Glen Canyon National Recreation Area. Indexed with states and counties as applicable.
Lake Rudolf  search
USELake Turkana
Lake Rudolph  search
USELake Turkana
Lake Saint Clair  search
RTDetroit River
 Great Lakes region
 Macomb County Michigan
 Michigan
 Michigan Lower Peninsula
 North America
 Ontario
 Saint Clair County Michigan
 Thames River
 Wayne County Michigan
SNSE Michigan and SW Ontario. Indexed with North America or Michigan and U.S. counties or and/or Ontario as applicable. Added to Thesaurus in 1989.
lake sediments  search
UFlacustrine sediments
RTglacial geology
 sediments
 fluviolacustrine environment
 lacustrine environment
 geochemical surveys
 mineral exploration
 lakes
 glaciolacustrine environment
 glaciolacustrine sedimentation
SNBefore 1998, used chiefly for economic studies. Also search (lacustrine environment OR fluviolacustrine environment OR glaciolacustrine environment) AND sediments. Before 1981, also search sediments AND lakes. Added to Thesaurus in 1981.
Lake Sevan  search
BTEurope
 .Armenia
 ..Lake Sevan
RTRazdan River
 Sevan Armenia
SNN Armenia. This term has multiple hierarchies.
Lake Superior  search
BTNorth America
 .Great Lakes
 ..Lake Superior
RTOntario
 Wisconsin
 Minnesota
 Michigan
 Batchawana Bay
 Lake Superior region
 Keweenaw Peninsula
 Thunder Bay
SNIndexed with Ontario and states as applicable.
Lake Superior Basin  search
USELake Superior region
Lake Superior region  search
BTNorth America
 .Lake Superior region
UFLake Superior Basin
RTOntario
 Wisconsin
 Minnesota
 Michigan
 Lake Superior
 Great Lakes region
 Lake Algonquin
 Southern Province
SNTerm reintroduced in 1985. Also search Lake Superior. Not a valid term from 1972-1984. Indexed with Lake Superior, Ontario and states as applicable. Added to Thesaurus in 1985.
Lake Suwa  search
BTnshu
 .Nagano Japan
 ..Lake Suwa
SNW central Honshu.
Lake Tahoe  search
BTUnited States
 .Lake Tahoe
RTCalifornia
 Nevada
 Douglas County Nevada
 El Dorado County California
 Placer County California
 Washoe County Nevada
SNE California and W Nevada. Indexed with states and counties as applicable.
Lake Tanganyika  search
BTAfrica
 .East African Lakes
 ..Lake Tanganyika
RTCongo Democratic Republic
 Zambia
 Burundi
 East African Rift
 Tanzania
SNIndexed with countries as applicable.
Lake Taupo  search
BTAustralasia
 .New Zealand
 ..Lake Taupo
RTNorth Island
SNCentral North Island, New Zealand. Also index North Island. Added to Thesaurus in 1989.
Lake Temiscamingue  search
USELake Timiskaming
Lake Temiskaming  search
USELake Timiskaming
Lake Tiberias  search
USESea of Galilee
Lake Timiskaming  search
BTCanada
 .Eastern Canada
 ..Lake Timiskaming
UFLake Temiscamingue
 Lake Temiskaming
 Temiscamingue Lake
 Temiskaming Lake
 Timiskaming Lake
RTOntario
 Quebec
 Timiskaming District Ontario
 Temiscamingue County Quebec
SNIn SW Quebec and E central Ontario. Before 1985, also search Timiskaming. Indexed with provinces as applicable. Added to Thesaurus in 1981.
Lake Titicaca  search
BTSouth America
 .Lake Titicaca
RTAltiplano
 La Paz Bolivia
 Puno Peru
SNIndexed with countries as applicable.
Lake Torrens  search
BTAustralasia
 .Australia
 ..South Australia
 ...Lake Torrens
SNE central South Australia.
Lake Turkana  search
BTAfrica
 .East Africa
 ..Lake Turkana
BTAfrica
 .East African Lakes
 ..Lake Turkana
UFLake Rudolf
 Lake Rudolph
 Rudolf (Lake)
RTEthiopia
 Sudan
 East African Rift
 Kenya
 Turkana Basin
SNNew name for Lake Rudolf. Primarily in Kenya. This term has multiple hierarchies. Indexed with countries as applicable.
Lake Uinta  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Eocene
 .....Lake Uinta
RTUnited States
 Utah
 Wyoming
 Colorado
SNExtinct lake. Occupied parts of W Colorado, SW Wyoming and E Utah during Eocene time. Indexed with states as applicable. Added to Thesaurus in 1985.
Lake Valley Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Mississippian
 .....Lower Mississippian
 ......Lake Valley Formation
RTNew Mexico
SNIncludes Alamogordo, Arcente, Dona Ana, and Nunn members.
Lake Vanda  search
BTAntarctica
 .Victoria Land
 ..Lake Vanda
SNSaline lake in dry-valleys region of S Victoria Land, near McMurdo Sound. Added to Thesaurus in 1981.
Lake Victoria  search
BTAfrica
 .East Africa
 ..Lake Victoria
BTAfrica
 .East African Lakes
 ..Lake Victoria
RTUganda
 Kenya
 Tanzania
SNThis term has multiple hierarchies. Indexed with countries as applicable.
Lake Washington  search
RTKing County Washington
 Minnesota
 Washington
SNNW Washington, near Seattle; Meeker County, S central Minnesota, and elsewhere. Indexed with states and counties as applicable. Added to Thesaurus in 1989.
Lake Winnipeg  search
BTCanada
 .Western Canada
 ..Manitoba
 ...Lake Winnipeg
SNS central Manitoba.
lake-level changes  search
RTlacustrine environment
 lakes
 levels
 paleogeography
 regression
 shorelines
 stratigraphy
 transgression
SNAlso search (lacustrine environment OR lacustrine sedimentation) AND (changes of level OR levels). Added to Thesaurus in 1998.
lakes  search
NTcrater lakes
 ephemeral lakes
 glacial lakes
 meromictic lakes
RTdrainage
 ecology
 eutrophication
 extinct lakes
 geomorphology
 glacial features
 glaciolacustrine environment
 hydrogen sulfide
 hydrology
 hydrosphere
 lacustrine environment
 lacustrine features
 lagoons
 lake sediments
 lake-level changes
 lava lakes
 limnology
 pale
SNUsed for the geomorphologic feature. As of 1981, use lacustrine environment for type of environment. Before 1972, was sometimes used in combination with extinct (i.e. lakes, extinct). Now use extinct lakes. Also index lacustrine features as applicable.
Lakota Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Lower Cretaceous
 .....Lakota Formation
RTWyoming
 Montana
 Nebraska
 South Dakota
 Inyan Kara Group
SNIn Inyan Kara Group. Montana, W South Dakota, NE Nebraska and E Wyoming. Added to Thesaurus in 1985.
Lakshmi Planum  search
BTVenus
 .Ishtar Terra
 ..Lakshmi Planum
SNHigh plateau region, W Ishtar Terra. Before 1993, also search Lakshmi Plateau AND Venus. Added to Thesaurus in 1993.
Lamar County Alabama  search
BTUnited States
 .Alabama
 ..Lamar County Alabama
SNW Alabama.
Lamar County Georgia  search
BTUnited States
 .Georgia
 ..Lamar County Georgia
SNW central Georgia.
Lamar County Mississippi  search
BTUnited States
 .Mississippi
 ..Lamar County Mississippi
SNSE Mississippi.
Lamar County Texas  search
BTUnited States
 .Texas
 ..Lamar County Texas
SNNE Texas.
Lamb County Texas  search
BTUnited States
 .Texas
 ..Lamb County Texas
Lambton County Ontario  search
BTCanada
 .Eastern Canada
 ..Ontario
 ...Lambton County Ontario
SNS Ontario.
lamellae  search
RTdeformation
 minerals
SNRestricted to use with minerals. Not used in biological sense.
Lamellibranchiata  search
USEBivalvia
laminar flow  search
RTcritical flow
 fluid dynamics
 ground water
 hydraulics
 hydrodynamics
 hydrology
 sediment transport
 sedimentation
SNAdded to Thesaurus in 1982.
laminations  search
BTsedimentary structures
 .planar bedding structures
 ..laminations
RTfoliation
 bedding
 cross-bedding
 stratification
 Bouma sequence
 laminite
 cross-laminations
 ripple drift-cross laminations
SNBefore 1976, also search lamination.
laminite  search
RTclastic rocks
 detritus
 flysch
 laminations
 planar bedding structures
 rhythmite
 turbidite
SNUsed as either a sedimentary rock or as a sedimentary structure. Also index clastic rocks or planar bedding structures as applicable. Added to Thesaurus in 1995.
Lamnidae  search
BTChordata
 .Vertebrata
 ..Pisces
 ...Chondrichthyes
 ....Elasmobranchii
 .....Selachii
 ......Galeoidea
 .......Lamnidae
SNFamily.
Lamoille County Vermont  search
BTUnited States
 .Vermont
 ..Lamoille County Vermont
Lamont-Doherty Earth Observatory  search
UFLamont-Doherty Geological Observatory
 LDEO
RTacademic institutions
 New York
SNIn Palisades, SE New York. Part of Columbia University.
Lamont-Doherty Geological Observatory  search
USELamont-Doherty Earth Observatory
Lamott Sandstone  search
USELamotte Sandstone
Lamotte Sandstone  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Cambrian
 ....Upper Cambrian
 .....Lamotte Sandstone
UFLamott Sandstone
RTMissouri
SNE and central Missouri. Added to Thesaurus in 1985.
Lamoure County North Dakota  search
BTUnited States
 .North Dakota
 ..Lamoure County North Dakota
Lampang Thailand  search
BTAsia
 .Far East
 ..Thailand
 ...Lampang Thailand
SNCity and province in NW Thailand.
Lampasas County Texas  search
BTUnited States
 .Texas
 ..Lampasas County Texas
lamproite  search
BTigneous rocks
 .plutonic rocks
 ..lamprophyres
 ...lamproite
lamproite pipes  search
SNNot a valid term for GeoRef. Search lamproite AND (pipes OR diatremes).
lamprophyre and carbonatite family  search
SNAs of 1981, no longer a valid term for GeoRef. Use lamprophyres or carbonatites as applicable.
lamprophyres  search
BTigneous rocks
 .plutonic rocks
 ..lamprophyres
NTalnoite
 camptonite
 kersantite
 lamproite
 minette
 monchiquite
 spessartite
 vogesite
SNBefore 1981, search lamprophyre and carbonatite family.
Lanark County Ontario  search
BTCanada
 .Eastern Canada
 ..Ontario
 ...Lanark County Ontario
NTPerth Ontario
Lancang-Gengma earthquake 1988  search
BTearthquakes
 .Lancang-Gengma earthquake 1988
UFGengma-Lancang earthquake 1988
RTChina
 Yunnan China
SNE Yunnan, China. Added to Thesaurus in 1993.
Lancara Form  search
Lancara Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Cambrian
 ....Lancara Formation
RTMiddle Cambrian
 Spain
 Lower Cambrian
SNLower and Middle Cambrian. Formerly considered Middle Cambrian. Overlies Herreira Sandstone. NW Spain. Indexed with Lower Cambrian and/or Middle Cambrian as applicable.
Lancashire England  search
BTEurope
 .Western Europe
 ..United Kingdom
 ...Great Britain
 ....England
 .....Lancashire England
NTClitheroe England
RTMorecambe Bay
 Liverpool Bay
 Manchester England
SNCounty in NW England. In 1974, parts were taken to form two new counties, Merseyside and Greater Manchester.
Lancaster County Nebraska  search
BTUnited States
 .Nebraska
 ..Lancaster County Nebraska
SNSE Nebraska.
Lancaster County Pennsylvania  search
BTUnited States
 .Pennsylvania
 ..Lancaster County Pennsylvania
SNSE Pennsylvania.
Lancaster County South Carolina  search
BTUnited States
 .South Carolina
 ..Lancaster County South Carolina
SNN South Carolina.
Lancaster County Virginia  search
BTUnited States
 .Virginia
 ..Lancaster County Virginia
SNE Virginia.
Lancaster Sound  search
BTCanada
 .Northwest Territories
 ..Franklin District Northwest Territories
 ...Lancaster Sound
BTCanada
 .Eastern Canada
 ..Lancaster Sound
SNChannel between Devon Island and N Baffin Island in E Franklin District. This term has multiple hierarchies.
Lance Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Upper Cretaceous
 .....Lance Formation
RTWyoming
 Montana
 Colorado
 North Dakota
 South Dakota
SNIncludes Colgate Sandstone Member, Cannonball Marine Member, Ludlow Lignitic Member, Tullock Member, Hell Creek Member, Torrington Member, and Ilo Ridge Member. Montana, W North Dakota, W South Dakota, and Wyoming.
Lanchou China  search
USELanzhou China
Lanchow China  search
USELanzhou China
land bridges  search
RTbiogeography
 continental drift
 faunal provinces
 floral provinces
 migration
 paleogeography
 sea-level changes
SNAdded to Thesaurus in 1985.
land canyons  search
USEcanyons
land cover maps  search
BTmaps
 .land use maps
 ..land cover maps
RTland use
 natural resources
 environmental geology maps
SNAlso search land cover and maps. Added to Thesaurus in 1993.
land forms  search
USElandforms
land leases  search
RTconservation
 reclamation
land loss  search
RTdegradation
 erosion
 erosion rates
 floods
 geologic hazards
 land subsidence
 land use
 polders
 reclamation
 sea-level changes
 shorelines
 soil erosion
 utilization
SNFor the environmental problem of loss of land from causes such as erosion, coastal subsidence, sea-level rise or major degradation of land quality. Also index specific type. Added to Thesaurus in 1998.
land management  search
RTagriculture
 basin management
 conservation
 decision-making
 environmental effects
 land use
 legislation
 natural resources
 public policy
 public lands
 regulations
 U. S. Bureau of Land Management
 wilderness areas
SNAdded to Thesaurus in 1998.
land reclamation  search
USEreclamation
land subsi  search
land subsidenc  search
land subsidence  search
RTabandoned mines
 collapse structures
 compactness
 dams
 engineering geology
 explosions
 foundations
 geologic hazards
 highways
 land loss
 mechanics
 mines
 oil and gas fields
 railroads
 rock mechanics
 settlement
 site exploration
 slope stability
 soil mechanics
 solu
SNUsed for geotechnical studies on land subsidence.
land use  search
RTagriculture
 airports
 arid environment
 basin management
 conservation
 constructed wetlands
 deforestation
 engineering geology
 environmental geology
 geologic hazards
 geologic sites
 human ecology
 impact statements
 Indian reservations
 land cover maps
 land loss
land use maps  search
BTmaps
 .land use maps
NTland cover maps
RTenvironmental geology
 land use
 environmental geology maps
SNBefore 1983, also search land use AND maps. Added to Thesaurus in 1983.
Land's End  search
BTEurope
 .Western Europe
 ..United Kingdom
 ...Great Britain
 ....England
 .....Cornwall England
 ......Land's End
UFLands End
SNCape. SW end of Cornwall.
Landenian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Paleocene
 .....upper Paleocene
 ......Landenian
SNBelgium.
Lander County Nevada  search
BTUnited States
 .Nevada
 ..Lander County Nevada
RTToquima Range
 Battle Mountain
 Copper Canyon
 Shoshone Mountains
 Toiyabe Range
SNN central Nevada.
Landers California  search
BTUnited States
 .California
 ..San Bernardino County California
 ...Landers California
SNMojave Desert, S California.
Landers earthquake 1992  search
BTearthquakes
 .Landers earthquake 1992
RTCalifornia
 Mojave Desert
 Big Bear earthquake 1992
 Joshua Tree earthquake 1992
 Southern California
 Little Skull Mountain earthquake 1992
SNEpicenter near Landers, San Bernardino County, S California. Big Bear earthquake 1992 is a major aftershock. Added to Thesaurus in 1995.
Landes France  search
BTEurope
 .Western Europe
 ..France
 ...Landes France
NTCapbreton France
RTAdour Basin
SNDepartment in SW France.
landfills  search
NTsanitary landfills
RTdisposal barriers
 engineering geology
 environmental geology
 far-field
 near-field
 underground disposal
 waste disposal
 waste disposal sites
 waste management
landform description  search
RTaerial photography
 description
 exhumation
 geomorphology
 landform evolution
 landforms
 landscapes
 morphometry
 mountains
 relief
 surficial geology
SNBefore 1975, also search surficial geology.
landform evolution  search
UFlandscape evolution
RTerosion
 geomorphology
 landform description
 beaches
 relief inversion
 etching
 exhumation
 paleorelief
 karstification
 resurfacing
 soil erosion
 erosion cycle
 relief
 emergent coastlines
 landforms
landforms  search
UFland forms
 relief features
RTplains
 geomorphology
 landform description
 mountains
 landform evolution
 valleys
 inliers
 steppes
 plateaus
 hills
 landscapes
 relief exposure
 tundra
landing sites  search
UFsites, landing
RTMoon
 Mars
 Venus
 Apollo Program
 lunar bases
 Viking Program
Lands End  search
USELand's End
Landsat  search
RTgeophysical methods
 geophysical surveys
 image enhancement
 imagery
 multispectral scanner
 remote sensing
 satellite methods
 telemetry
 thematic mapper
SNBefore 1978, also search ERTS; ERTS-1.
landscape evolution  search
USElandform evolution
landscapes  search
RTgeomorphology
 landform description
 landforms
 tundra
landslides  search
BTmass movements
 .landslides
RTdebris cones
 erosion
 slope stability
 engineering geology
 soils
 avalanches
 creep
 geomorphology
 geologic hazards
 retaining walls
 slopes
 gravity flows
 damage
 talus slopes
 soil erosion
 slumping
 mudslides
 mudflows
 rockslides
Lane County Kansas  search
BTUnited States
 .Kansas
 ..Lane County Kansas
SNW central Kansas.
Lane County Oregon  search
BTUnited States
 .Oregon
 ..Lane County Oregon
SNOn Pacific Ocean in W Oregon.
Lanersbach Austria  search
BTEurope
 .Central Europe
 ..Austria
 ...Tyrol Austria
 ....Lanersbach Austria
SNVillage SE of Innsbruck in central Tyrol, W Austria.
Laneuveville-devant-Nancy Boring  search
RTMeurthe-et-Moselle France
SNBoring at or near outer SE suburb of Nancy. Indexed with location.
Laney Shale Member  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Eocene
 .....middle Eocene
 ......Laney Shale Member
RTWyoming
 Colorado
 Green River Formation
SNOf Green River Formation. SW Wyoming.
langbeinite  search
BTsulfates
 .langbeinite
Langebaanweg South Africa  search
BTAfrica
 .Southern Africa
 ..South Africa
 ...Western Cape Province South Africa
 ....Langebaanweg South Africa
RTCape Province region
SNVillage in SW South Africa.
Langesund Fjord  search
BTEurope
 .Western Europe
 ..Scandinavia
 ...Norway
 ....Telemark Norway
 .....Langesund Fjord
RTSkagerrak
SNInlet of the Skagerrak.
Langhe  search
BTEurope
 .Southern Europe
 ..Italy
 ...Langhe
RTPiemonte Italy
SNRegion NW of Genoa.
Langhian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Neogene
 ....Miocene
 .....Langhian
SNEurope.
Langkawi Islands  search
BTAsia
 .Far East
 ..Malaysia
 ...West Malaysia
 ....Langkawi Islands
RTKedah Malaysia
SNGroup in Andaman Sea near entrance to Strait of Malacca. Administrated by Kedah state in West Malaysia. Also search Langkawi. This term has multiple hierarchies.
Langlade County Wisconsin  search
BTUnited States
 .Wisconsin
 ..Langlade County Wisconsin
Langmuir equation  search
RTadsorption
 equations
 geochemistry
 soils
SNAdded to Thesaurus in 1985.
Languedoc  search
BTEurope
 .Western Europe
 ..France
 ...Languedoc
SNHistorical region of S France.
Lanier County Georgia  search
BTUnited States
 .Georgia
 ..Lanier County Georgia
Lansing Group  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Pennsylvanian
 .....Upper Pennsylvanian
 ......Missourian
 .......Lansing Group
RTKansas
 Plattsburg Limestone
 Stanton Formation
SNIncludes Lane Shale, Plattsburg Limestone, Vilas Shale, Stanton Limestone.
Lansing Michigan  search
BTUnited States
 .Michigan
 ..Michigan Lower Peninsula
 ...Lansing Michigan
RTClinton County Michigan
 Eaton County Michigan
 Ingham County Michigan
SNCity in Clinton, Eaton, and Ingham counties, S Michigan. Indexed with counties as applicable.
lanthanide series  search
USErare earths
lanthanides  search
USErare earths
lanthanoans  search
USErare earths
lanthanum  search
BTmetals
 .rare earths
 ..lanthanum
UFLa
RTlithophile elements
 cerium
Lanzarote  search
BTAtlantic Ocean Islands
 .Canary Islands
 ..Lanzarote
SNEasternmost of the Spanish controlled Canary Islands.
Lanzhou China  search
BTAsia
 .Far East
 ..China
 ...Gansu China
 ....Lanzhou China
UFLanchou China
 Lanchow China
SNCapital of Gansu on the Huang He, Loess Plateau of central China.
Lanzo Massif  search
BTEurope
 .Southern Europe
 ..Italy
 ...Piemonte Italy
 ....Lanzo Massif
SNNW of Turin in Piemonte.
Laos  search
BTAsia
 .Far East
 ..Laos
RTIndochina
Lapeer County Michigan  search
BTUnited States
 .Michigan
 ..Michigan Lower Peninsula
 ...Lapeer County Michigan
lapilli  search
RTejecta
 pyroclastics
 volcaniclastics
lapis lazuli  search
USElazurite
Laplace azimuths  search
USELaplace transformations
Laplace points  search
USELaplace transformations
Laplace tidal equation  search
USELaplace transformations
Laplace transformations  search
UFLaplace azimuths
 Laplace points
 Laplace tidal equation
 Laplace transforms
 transformations, Laplace
RTgeodesy
Laplace transforms  search
USELaplace transformations
Lapland  search
BTEurope
 .Lapland
NTLapland Finland
RTRussian Federation
 Finland
 Kola Peninsula
 Sweden
 Finnmark Norway
 Norway
 Nordland Norway
 Vasterbotten Sweden
 Norrbotten Sweden
 Murmansk Russian Federation
 Troms Norway
SNRegion mainly N of the Arctic Circle including the Kola Peninsula of the Russian Federation. Indexed with countries as applicable. For Finland, use Lapland Finland.
Lapland Finland  search
BTEurope
 .Western Europe
 ..Scandinavia
 ...Finland
 ....Lapland Finland
BTEurope
 .Lapland
 ..Lapland Finland
NTInari Finland
 Sodankyla Finland
UFLappi Finland
SNProvince, N Finland. This term has multiple hierarchies. Added to Thesaurus in 1998.
Laporte County Indiana  search
BTIndiana
 .Laporte County Indiana
Lappi Finland  search
USELapland Finland
Laprairie County Quebec  search
BTCanada
 .Eastern Canada
 ..Quebec
 ...Laprairie County Quebec
Laptev Sea  search
BTArctic Ocean
 .Laptev Sea
RTAnabar Bay
SNAlong N coast of Siberia between Taymyr Peninsula and New Siberian Islands.
Lar  search
SNNo longer a valid term for GeoRef. Use Lar Iran for the city. Also see Lar Valley.
Lar Iran  search
BTAsia
 .Middle East
 ..Iran
 ...Fars Iran
 ....Lar Iran
RTLar Valley
SNCity in Laristan region, Fars in S Iran.
Lar Valley  search
RTElburz
 Iran
 Lar Iran
SNValley in N Iran. Indexed with Iran or region as applicable. Added to Thesaurus in 1995.
Lara Venezuela  search
BTSouth America
 .Venezuela
 ..Lara Venezuela
SNState in NW Venezuela.
Laramian Orogenic Phase  search
USELaramide Orogeny
Laramian Orogeny  search
USELaramide Orogeny
Laramic Orogeny  search
USELaramide Orogeny
Laramide Orogeny  search
UFLaramian Orogenic Phase
 Laramian Orogeny
 Laramic Orogeny
 Laramide Revolution
RTCretaceous
 Tertiary
 Upper Cretaceous
 Paleocene
 United States
 orogeny
 tectonics
 Rocky Mountains
 Cordilleran Orogeny
SNA time of deformation typically developed in the eastern Rocky Mountains of the United States, whose several phases extended from Upper Cretaceous until the end of the Paleocene. Before 1978, search orogeny AND Laramide; Laramian. Indexed with ages as app
Laramide Revolution  search
USELaramide Orogeny
Laramie anorthosite complex  search
BTChronostratigraphic Units
 .Precambrian
 ..Laramie anorthosite complex
RTWyoming
SNAdded to Thesaurus in 1989.
Laramie Basin  search
BTUnited States
 .Wyoming
 ..Laramie Basin
SNHigh plateau in SE between Laramie Mountains on E and Medicine Bow Mountains on the W.
Laramie County Wyoming  search
BTUnited States
 .Wyoming
 ..Laramie County Wyoming
RTSilo Field
SNSE Wyoming.
Laramie Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Upper Cretaceous
 .....Laramie Formation
RTWyoming
 Montana
 Colorado
 Kansas
 Arizona
 South Dakota
SNOverlies Fox Hills Formation; unconformably underlies Denver Formation. Denver Basin region of E Colorado. Also in Arizona, N Colorado, Kansas, Montana, South Dakota and Wyoming.
Laramie Mountains  search
BTUnited States
 .U. S. Rocky Mountains
 ..Laramie Mountains
RTWyoming
 Colorado
 Front Range
SNA range of the Rocky Mountains. This term has multiple hierarchies. Indexed with states as applicable.
Lardeau Group  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Cambrian
 ....Lardeau Group
RTPrecambrian
 Canada
 British Columbia
SNIncludes Triune and Sharon Creek Formations.
Larder Lake District Ontario  search
BTCanada
 .Eastern Canada
 ..Ontario
 ...Larder Lake District Ontario
UFLarder Lake region
RTgold ores
 Timiskaming District Ontario
SNE Ontario.
Larder Lake region  search
USELarder Lake District Ontario
Larderello  search
BTEurope
 .Southern Europe
 ..Italy
 ...Tuscany Italy
 ....Larderello
UFLarderello Field
 Larderello-Travale geothermal field
RTgeothermal fields
SNGeothermal field and geothermal region in central Italy.
Larderello Field  search
USELarderello
Larderello-Travale geothermal field  search
USELarderello
Large Aperture Seismic Array  search
USELASA
Largentiere France  search
BTEurope
 .Western Europe
 ..France
 ...Ardeche France
 ....Largentiere France
SNVillage in SE France.
Larimer County Colorado  search
BTUnited States
 .Colorado
 ..Larimer County Colorado
NTLoveland Colorado
RTRocky Mountain National Park
SNN Colorado.
Larix  search
BTPlantae
 .Spermatophyta
 ..Gymnospermae
 ...Coniferales
 ....Pinaceae
 .....Larix
SNGenus.
larnite  search
BTsilicates
 .orthosilicates
 ..nesosilicates
 ...larnite
Larue County Kentucky  search
BTUnited States
 .Kentucky
 ..Larue County Kentucky
larvae  search
RTontogeny
 paleontology
 reproduction
SNAdded to Thesaurus in 1985.
Larvik Norway  search
BTEurope
 .Western Europe
 ..Scandinavia
 ...Norway
 ....Vestfold Norway
 .....Larvik Norway
SNTown at head of Larvik Fjord near entrance to Oslofjord.
Las Animas County Colorado  search
BTUnited States
 .Colorado
 ..Las Animas County Colorado
RTSpanish Peaks
SNSE Colorado.
Las Cruces New Mexico  search
BTUnited States
 .New Mexico
 ..Dona Ana County New Mexico
 ...Las Cruces New Mexico
SNCity in Rio Grande Valley, S New Mexico.
Las Palmas, Canary Islands  search
USECanary Islands
SNFor the Spanish province, use Canary Islands.
Las Vegas Nevada  search
BTUnited States
 .Nevada
 ..Clark County Nevada
 ...Las Vegas Nevada
SNCity in extreme S Nevada.
Las Vegas Valley  search
BTUnited States
 .Nevada
 ..Las Vegas Valley
RTClark County Nevada
SNS Nevada. Indexed with counties as applicable. Added to Thesaurus in 1981.
Las Villas  search
SNNo longer a valid term for GeoRef. See Villa Clara Cuba.
LASA  search
UFLarge Aperture Seismic Array
RTMontana
 arrays
 seismic networks
 seismographs
SNArray of seismographs.
Lascar  search
BTSouth America
 .Chile
 ..Antofagasta Chile
 ...Lascar
RTvolcanoes
SNVolcano, N. Chile.
Laser Geodynamics Satellite  search
USELageos
laser methods  search
NTlidar methods
UFlaser probe
 probe, laser
RTspectroscopy
 chemical analysis
 geophysical methods
 Doppler effect
 analysis
 remote sensing
 methods
 electromagnetic methods
 laser ranging
 lunar laser ranging
SNFor surveys, also index geophysical surveys. Added to Thesaurus in 1982.
laser probe  search
USElaser methods
laser radar methods  search
USElidar methods
laser ranging  search
RTanalysis
 geodesy
 geophysical methods
 geophysical surveys
 Lageos
 laser methods
 lunar laser ranging
 methods
 remote sensing
 satellite methods
 spectroscopy
SNAs of 1993, use in combination with satellite methods and/or space shuttle methods. Also see lunar laser ranging. Added to Thesaurus in 1989.
Lassen County California  search
BTUnited States
 .California
 ..Lassen County California
RTLassen Volcanic National Park
SNNE California.
Lassen Peak  search
BTUnited States
 .California
 ..Shasta County California
 ...Lassen Peak
UFMount Lassen
 Mt. Lassen
RTvolcanoes
SNActive volcano in Lassen Volcanic National Park in NE California.
Lassen Volcanic National Park  search
BTUnited States
 .California
 ..Lassen Volcanic National Park
RTnational parks
 Lassen County California
 Shasta County California
 Mill Creek
 Plumas County California
 Tehama County California
SNNE California. Indexed with counties as applicable.
last glacial maximum  search
UFglacial maximum, last
 pleniglacial, last
RTUpper Pleistocene
 glaciation
 environmental geology
 climate
 Quaternary
 paleoclimatology
 late-glacial environment
 glacial environment
SNTerm is often used with paleoclimate studies in which a more specific age term is not available. Indexed with also age and area when possible. Added to Thesaurus in 1995.
lat  search
Latah County Idaho  search
BTUnited States
 .Idaho
 ..Latah County Idaho
SNN Idaho.
Latdorfian  search
USELattorfian
late diagenesis  search
BTdiagenesis
 .late diagenesis
RTburial diagenesis
 early diagenesis
late-glacial environment  search
UFlateglacial environment
RTglacial geology
 glaciation
 depositional environment
 Heinrich events
 deglaciation
 periglacial environment
 glacial erosion
 glacial sedimentation
 interglacial environment
 interstadial environment
 last glacial maximum
SNAdded to Thesaurus in 1998.
late-glacial period  search
SNNot a a valid term for GeoRef. In NW Europe, it is usually applied to the upper Weichselian period including Older Dryas, Allerod, and Younger Dryas. In Britain, it is usually considered upper Devensian. Use specific age term.
lateglacial environment  search
USElate-glacial environment
Latemar Massif  search
BTEurope
 .Alps
 ..Eastern Alps
 ...Dolomites
 ....Latemar Massif
BTEurope
 .Southern Europe
 ..Italy
 ...Trentino-Alto Adige Italy
 ....Latemar Massif
SNIn Dolomites. This term has multiple hierarchies.
lateral faults  search
BTfaults
 .lateral faults
NTleft-lateral faults
 right-lateral faults
SNAdded to Thesaurus in 1989.
lateral heterogeneity  search
RTmantle
 upper mantle
 velocity structure
SNAdded to Thesaurus in 1989.
lateral loading  search
BTloading
 .lateral loading
RTsoil mechanics
 testing
 load tests
 engineering properties
SNAdded to Thesaurus in 1989.
lateral logging  search
USELaterolog
Laterite soils  search
USElaterites
laterites  search
BTsoils
 .laterites
UFLaterite soils
 lateritic soils
RTsoil group
 bauxite
 ocher
 bauxitization
 laterization
 biorhexistasy
 Latosols
lateritic soils  search
USElaterites
laterization  search
RTbauxitization
 laterites
 mineral deposits, genesis
 soils
Laterolog  search
UFfocused current logging
 guard log
 lateral logging
RTwell-logging
 electrical logging
 resistivity
SNAdded to Thesaurus in 1984.
Lathi Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Jurassic
 ....Lathi Formation
RTIndia
 Rajasthan India
Latimer County Oklahoma  search
BTUnited States
 .Oklahoma
 ..Latimer County Oklahoma
RTOuachita Mountains
SNSE Oklahoma.
Latin America  search
RTAmerica
 Central America
 South America
SNRegion comprising South America except the Guianas; Central America except Belize; Mexico, Cuba, Puerto Rico, Dominican Republic and some of the islands in the West Indies. Used only when a more specific area term is not given. Added to Thesaurus in 1981.
latite  search
BTigneous rocks
 .volcanic rocks
 ..trachyandesites
 ...latite
RTquartz latite
latitude  search
RTaltitude
 climate
 geodesy
 paleolatitude
SNIncludes latitude effects. Added to Thesaurus in 1993.
latitude, paleo-  search
USEpaleolatitude
Latium Italy  search
BTEurope
 .Southern Europe
 ..Italy
 ...Latium Italy
NTAlban Hills
 Frosinone Italy
 Rome Italy
 Sabatini Mountains
 Tolfa Hills
 Viterbo Italy
RTTiber Valley
SNAutonomous region in W central Italy.
Latosols  search
BTsoils
 .Latosols
RTsoil group
 laterites
Latrobe Group  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Paleocene
 .....Latrobe Group
RTAustralia
 Victoria Australia
 Gippsland Basin
SNGippsland Basin of Victoria. Added to Thesaurus in 1989.
Latrobe Valley  search
RTGippsland Basin
 Victoria Australia
SNCoal mining region in S Victoria. Indexed with Victoria Australia as applicable. Added to Thesaurus in 1989.
lattice  search
UFBravais lattice
 crystal lattice
 space lattice
 translation lattice
RTcrystal structure
 crystal systems
 cell dimensions
 lattice parameters
 habit
 unit cell
 twinning
 substitution
lattice constants  search
USElattice parameters
lattice par  search
lattice parameters  search
UFlattice constants
RTcrystal structure
 crystallography
 cell dimensions
 crystal chemistry
 lattice
 crystal growth
 unit cell
SNBefore 1979, also search (lattice OR crystal structure) AND parameters.
Lattorfian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Eocene
 .....upper Eocene
 ......Lattorfian
UFLatdorfian
RTKrosno Beds
 Tongrian
 Sannoisian
SNEurope.
Latur earthquake 1993  search
BTearthquakes
 .Latur earthquake 1993
UFKillari earthquake 1993
RTIndia
 Maharashtra India
SNEpicenter near Latur, Maharashtra, central India.
Latvia  search
BTEurope
 .Baltic region
 ..Latvia
NTRiga Latvia
RTBaltic Glaciation
 Baltic Plain
 Russian Platform
 Baltica
 Baltic Shield
 Dvina River
 Russian Plain
SNFormerly the Latvian Soviet Socialist Republic.
Lau Basin  search
BTPacific Ocean
 .South Pacific
 ..Southeast Pacific
 ...Lau Basin
RTDSDP Site 203
 Leg 135
 ODP Site 834
 ODP Site 835
 ODP Site 836
 ODP Site 837
 ODP Site 838
 ODP Site 839
SNWest of the Tonga Islands and S of the Lau group of the Fiji Islands. This term has multiple hierarchies.
Lauderdale County Alabama  search
BTUnited States
 .Alabama
 ..Lauderdale County Alabama
SNExtreme NW Alabama.
Lauderdale County Mississippi  search
BTUnited States
 .Mississippi
 ..Lauderdale County Mississippi
SNE Mississippi.
Lauderdale County Tennessee  search
BTUnited States
 .Tennessee
 ..Lauderdale County Tennessee
SNW Tennessee.
laughing gas  search
USEnitrous oxide
laumonite  search
USElaumontite
laumontite  search
BTsilicates
 .framework silicates
 ..zeolite group
 ...laumontite
UFlaumonite
 lomonite
 lomontite
RTleonhardite
Lauraceae  search
BTPlantae
 .Spermatophyta
 ..Angiospermae
 ...Dicotyledoneae
 ....Lauraceae
SNFamily.
Laurasia  search
RTcontinental drift
 Eurasia
 Gondwana
 Laurentia
 Northern Hemisphere
 Pangaea
 supercontinents
SNThe protocontinent of the Northern Hemisphere which is a combination of Laurentia and Eurasia. It included most of North America, Greenland, and much of Eurasia excluding India.
Laurel County Kentucky  search
BTUnited States
 .Kentucky
 ..Laurel County Kentucky
Laurens County Georgia  search
BTUnited States
 .Georgia
 ..Laurens County Georgia
Laurens County South Carolina  search
BTUnited States
 .South Carolina
 ..Laurens County South Carolina
Laurentia  search
RTAtlantic region
 Baltica
 Canadian Shield
 continental drift
 Greenland
 Laurasia
 North America
 plate tectonics
 Scotland
 supercontinents
SNAncient continent which formed in the early Proterozoic. It preceeded Laurasia. Included much of the Canadian Shield and Greenland and NW Scotland. Indexed with countries and continents as applicable. Added to Thesaurus in 1993.
Laurentian Highlands  search
SNNot a valid term for GeoRef. Use Canadian Shield or, for the mountains of S Quebec, use Laurentian Mountains as applicable.
Laurentian Plateau  search
USECanadian Shield
Laurentide ice sheet  search
RTDes Moines Lobe
 Lake Michigan Lobe
 Saint Lawrence Lowlands
 Saint Lawrence Valley
Laurion Greece  search
BTEurope
 .Southern Europe
 ..Greece
 ...Sterea Ellas
 ....Laurion Greece
UFLaurium Greece
 Lavrion Greece
SNCity SE of Athens.
Laurium Greece  search
USELaurion Greece
Laurussia  search
RTBaltic region
 Canadian Shield
 continental drift
 Europe
 North America
 Russian Platform
SNLarge landmass thought to have formed from merger of Baltica and Laurentia in mid-Paleozoic and to have become part of Laurasia in late Paleozoic. Indexed with countries and continents as applicable.
Lausitz  search
USELusatia
lava  search
NTaa lava
 pahoehoe
 pillow lava
RTbasalts
 effusion
 eruptions
 extrusive rocks
 flow mechanism
 igneous rocks
 inclusions
 lava channels
 lava fields
 lava flows
 lava lakes
 lava tubes
 magmas
 mud volcanoes
 paleomagnetism
 peperite
 perlite
 petrology
 phreatomagmatism
 pillow structure
 plugs
 vesicular
SNUsed for all molten extrusives and the rocks that solidify from them.
lava channels  search
BTvolcanic features
 .lava channels
RTlava
 geomorphology
 channels
lava domes  search
USEshield volcanoes
lava fields  search
BTvolcanic features
 .lava fields
UFfields, lava
RTlava
 geomorphology
 volcanic fields
lava flows  search
UFflow (volcanic)
 nappe (volcanic)
RTlava
 volcanology
 flow texture
 flows
 basalt flows
 flood basalts
 volcanic features
 effusion
 flow mechanism
 lahars
 lava tubes
SNAlso search specific types, such as basalt flows or rhyolite flows as applicable.
lava lakes  search
RTcrater lakes
 geomorphology
 lakes
 lava
 volcanic features
lava tubes  search
BTvolcanic features
 .lava tubes
UFlava tunnels
 tubes, lava
RTlava
 geomorphology
 lava flows
 speleology
lava tunnels  search
USElava tubes
Lavaca County Texas  search
BTUnited States
 .Texas
 ..Lavaca County Texas
SNSE Texas.
Laval Basin  search
BTEurope
 .Western Europe
 ..France
 ...Laval Basin
Lavery Till  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Quarternary
 ....Pleistocene
 .....Upper Pleistocene
 ......Wisconsinan
 .......Lavery Till
RTPennsylvania
SNNW Pennsylvania. Added to Thesaurus in 1985.
Lavinia Planitia  search
BTVenus
 .Lavinia Planitia
SNLowland.
Lavrion Greece  search
USELaurion Greece
Law of the Sea  search
UFUNCLOS
 United Nations Convention on the Law of the Sea
RTocean floors
 oceanography
 mineral resources
 international cooperation
 economic geology
 legislation
 nodules
 Exclusive Economic Zone
 United States Exclusive Economic Zone
 world ocean
 mining legislation
SNAdded to Thesaurus in 1982.
Lawrence County Alabama  search
BTUnited States
 .Alabama
 ..Lawrence County Alabama
SNNW Alabama.
Lawrence County Arkansas  search
BTUnited States
 .Arkansas
 ..Lawrence County Arkansas
SNNE Arkansas.
Lawrence County Illinois  search
BTUnited States
 .Illinois
 ..Lawrence County Illinois
SNBounded by Wabash River in SE Illinois.
Lawrence County Indiana  search
BTIndiana
 .Lawrence County Indiana
SNS Indiana.
Lawrence County Kentucky  search
BTUnited States
 .Kentucky
 ..Lawrence County Kentucky
SNNE Kentucky.
Lawrence County Mississippi  search
BTUnited States
 .Mississippi
 ..Lawrence County Mississippi
SNS central Mississippi.
Lawrence County Missouri  search
BTUnited States
 .Missouri
 ..Lawrence County Missouri
SNSW Missouri.
Lawrence County Ohio  search
BTUnited States
 .Ohio
 ..Lawrence County Ohio
SNS Ohio.
Lawrence County Pennsylvania  search
BTUnited States
 .Pennsylvania
 ..Lawrence County Pennsylvania
SNW Pennsylvania.
Lawrence County South Dakota  search
BTUnited States
 .South Dakota
 ..Lawrence County South Dakota
RTBlack Hills
 Whitewood Creek
 Homestake Mine
SNW South Dakota.
Lawrence County Tennessee  search
BTUnited States
 .Tennessee
 ..Lawrence County Tennessee
SNS Tennesse.
Lawrence Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Pennsylvanian
 .....Upper Pennsylvanian
 ......Virgilian
 .......Lawrence Formation
RTIowa
 Missouri
 Nebraska
 Kansas
 Douglas Group
SNIncludes two unnamed shale members separated by Amazonia Limestone Member, Ireland Limestone Member. SW Iowa, E Kansas, NW Missouri, and SE Nebraska.
Lawrence Livermore National Laboratory  search
BTUnited States
 .California
 ..Alameda County California
 ...Lawrence Livermore National Laboratory
RTLivermore California
SNNear Livermore, E of San Francisco Bay, Central California.
lawrencium  search
BTmetals
 .actinides
 ..lawrencium
UFLr
SNChemical element.
laws  search
SNNot a valid term for GeoRef. As of 1993, use legislation or principles as applicable.
lawsonite  search
BTsilicates
 .orthosilicates
 ..sorosilicates
 ...lawsonite
RTaluminosilicates
Laxfordian  search
BTChronostratigraphic Units
 .Precambrian
 ..Proterozoic
 ...Mesoproterozoic
 ....Laxfordian
SNEurope.
layer, active  search
USEactive layer
layer, basaltic  search
USEbasaltic layer
layer, boundary  search
USEboundary layer
layer, granitic  search
USEgranitic layer
layer, nepheloid  search
USEnepheloid layer
layered  search
SNA valid index term through 1977. After 1977, use layered intrusions, layered materials, or multiple aquifers.
layered intrusions  search
BTintrusions
 .layered intrusions
RTigneous rocks
 magma contamination
SNNot a valid term from 1975-1977. Before 1978, also search intrusions AND layered.
layered materials  search
UFlayered media
 multilayered materials
RTmaterials
 engineering geology
 transverse isotropy
 multiple aquifers
 delamination
 stratification
 preferential flow
 mineral interlayer
 two-layer models
SNBefore 1981, also search layered; layers. After 1992, use multiple aquifers for aquifers. Added to Thesaurus in 1981.
layered media  search
USElayered materials
layers  search
SNA valid term through 1978. See layered materials.
lazulite  search
BTphosphates
 .lazulite
lazurite  search
BTsulfides
 .lazurite
BTsulfates
 .lazurite
BTsilicates
 .framework silicates
 ..sodalite group
 ...lazurite
UFlapis lazuli
RTgems
SNThis term has multiple hierarchies.
LDEF  search
USELong Duration Exposure Facility
LDEO  search
USELamont-Doherty Earth Observatory
ldocerataceae  search
NTHildoceratidae
Le Flore County Oklahoma  search
BTUnited States
 .Oklahoma
 ..Le Flore County Oklahoma
SNSE Oklahoma.
Le Havre France  search
BTEurope
 .Western Europe
 ..France
 ...Seine-Maritime France
 ....Le Havre France
SNCity on the English Channel in N France.
Le Mans France  search
BTEurope
 .Western Europe
 ..France
 ...Sarthe France
 ....Le Mans France
SNCity in NE central France.
Le Mont-Dore France  search
USEMont-Dore France
Le Sueur County Minnesota  search
BTUnited States
 .Minnesota
 ..Le Sueur County Minnesota
Le Trou Sans Fond  search
USETrou Sans Fond
Lea County New Mexico  search
BTUnited States
 .New Mexico
 ..Lea County New Mexico
RTCentral Basin Platform
SNExtreme SE New Mexico.
leach  search
leachate  search
RTgeochemistry
 leaching
 mining geology
 pollutants
 pollution
 seepage
 soils
 solutions
 waste disposal
SNUse leaching or solution for the process. Added to Thesaurus in 1993.
leaching  search
UFlixiviation
RTmining geology
 geochemistry
 soils
 solution
 solute transport
 alteration
 weathering
 degradation
 preferential flow
 desalinization
 pedogenesis
 gossan
 infiltrometers
 percolation
 leachate
 solution mining
lead  search
BTmetals
 .lead
NTPb-204
 Pb-206
 Pb-206/Pb-204
 Pb-207
 Pb-207/Pb-204
 Pb-207/Pb-206
 Pb-208
 Pb-208/Pb-204
 Pb-208/Pb-206
 Pb-210
 U-238/Pb-204
 U-238/Pb-206
UFPb
RTlead-zinc deposits
 isotopes
 Pb/Pb
 Pb/Th
 chalcophile elements
 lead ores
 heavy metals
 HIMU
 U/Pb
 U/Th/Pb
SNChemical element. Use lead ores for lead as a commodity.
lead glance  search
USEgalena
lead ores  search
BTmetal ores
 .lead ores
RTlead-zinc deposits
 base metals
 Bunker Hill Mine
 lead
 galena
 mississippi valley-type deposits
SNCommodity. See List C.
lead-lead  search
USEPb/Pb
lead-zinc deposits  search
BTmetal ores
 .lead-zinc deposits
UFlead-zinc ores
RTAberfeldy
 Broken Hill Mine
 Gays River Deposit
 lead ores
 Bluebell Mine
 Bunker Hill Mine
 lead
 Leadville mining district
 cyprus-type deposits
 mississippi valley-type deposits
 Hosokura Mine
 Janggun Mine
 Kamioka Mine
 Keban Mine
 Pine Point mining district
 Sulli
SNBefore 1978, also search lead-zinc AND (deposit OR deposits OR ore OR ores OR economic) in the basic index. Commodity. See List C.
lead-zinc ores  search
USElead-zinc deposits
leadhillite  search
BTcarbonates
 .leadhillite
BTsulfates
 .leadhillite
SNThis term has multiple hierarchies.
Leadville Colorado  search
BTUnited States
 .Colorado
 ..Lake County Colorado
 ...Leadville Colorado
RTSaint Kevin Gulch
SNCity in central Colorado.
Leadville Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Mississippian
 .....Leadville Formation
RTColorado
 Yule Marble
SNIncludes Gilman Sandstone Member.
Leadville mining district  search
BTUnited States
 .Colorado
 ..Lake County Colorado
 ...Leadville mining district
RTmines
 lead-zinc deposits
 silver ores
 polymetallic ores
 gold ores
 Colorado mineral belt
SNIn the central Colorado mineral belt, Leadville area, Lake County Colorado. Lead-zinc, silver, and gold deposits. Before 1993, also search (Leadville District OR Leadville Colorado) with commodity. Added to Thesaurus in 1993.
leaf  search
USEleaves
leakage  search
USEseepage
leakage anomalies  search
RTanomalies
 dispersion patterns
 geochemistry
 hydrothermal alteration
 mineral deposits, genesis
SNAdded to Thesaurus in 1981.
Leake County Mississippi  search
BTUnited States
 .Mississippi
 ..Leake County Mississippi
leaking underground storage tanks  search
UFLUST
RTreclamation
 pollution
 ground water
 seepage
 polluted water
 remediation
 dense nonaqueous phase liquids
 underground installations
 nonaqueous phase liquids
 light nonaqueous phase liquids
 underground storage
 oil storage
 gasoline
 petroleum products
 underground
SNAdded to Thesaurus in 1993.
leaky aquifers  search
RTaquifers
 aquitards
 confining beds
 ground water
 multiple aquifers
 seepage
SNAdded to Thesaurus in 1985.
learning  search
SNNot a valid term for GeoRef. See education.
least squares analysis  search
USEleast-squares analysis
least-squares analysis  search
BTstatistical analysis
 .least-squares analysis
UFleast squares analysis
RTanalysis
 regression analysis
Leavenworth County Kansas  search
BTUnited States
 .Kansas
 ..Leavenworth County Kansas
SNNE Kansas.
leaves  search
UFleaf
RTPlantae
 paleobotany
 vegetation
 flowers
 humus
Leba  search
SNNot a valid term for GeoRef. Before 1995, sometimes used for the river in N Poland; now use Leba River. After 1992, use Leba Poland for the town.
Leba Poland  search
BTEurope
 .Central Europe
 ..Poland
 ...Leba Poland
SNTown on the Baltic in Slupsk province.
Lebanon  search
BTAsia
 .Middle East
 ..Lebanon
NTBeirut Lebanon
RTMediterranean region
 Judea Group
Lebanon County Pennsylvania  search
BTUnited States
 .Pennsylvania
 ..Lebanon County Pennsylvania
SNSE central Pennsylvania.
Lebedin Ukraine  search
BTEurope
 .Ukraine
 ..Lebedin Ukraine
SNCity in Sumy Oblast in NE central Ukraine. This term has multiple hierarchies.
lebensspuren  search
BTsedimentary structures
 .biogenic structures
 ..lebensspuren
RTichnofossils
 burrows
 ichnofacies
 casts
 borings
 ichnofabric
 coprolites
 tracks
 trails
SNBefore 1981, also search ichnofossils. Before 1973, also search trace fossils. As of 1981, used when the emphasis is sedimentary petrology, not paleontology. Use ichnofossils for paleontologic studies.
Lebo Member  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Paleocene
 .....Lebo Member
RTMontana
 Fort Union Formation
SNPaleocene. Considered Eocene earlier. Montana. In Fort Union Formation. Added to Thesaurus in 1993.
Lebombo Mountains  search
BTAfrica
 .Lebombo Mountains
RTMpumalanga South Africa
 South Africa
 Swaziland
 Transvaal region
 Northern Province South Africa
 Mozambique
SNBefore 1978, also search Lebombo. Indexed with Mozambique and/or Northern Province South Africa and/or Mpumalanga South Africa and/or Swaziland.
Lecce Italy  search
BTEurope
 .Southern Europe
 ..Italy
 ...Apulia Italy
 ....Lecce Italy
SNCity and province in heel of Italian boot, SE Italy.
lechatelierite  search
BTsilicates
 .framework silicates
 ..silica minerals
 ...lechatelierite
Lechtal Alps  search
BTEurope
 .Central Europe
 ..Austria
 ...Tyrol Austria
 ....Lechtal Alps
BTEurope
 .Alps
 ..Lechtal Alps
SNW Tyrol. This term has multiple hierarchies.
Lechuguilla Cave  search
BTUnited States
 .New Mexico
 ..Eddy County New Mexico
 ...Lechuguilla Cave
RTCarlsbad Caverns
 Guadalupe Mountains
SNCarlsbad Caverns National Park, SE New Mexico.
Lecompton Limestone  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Pennsylvanian
 .....Upper Pennsylvanian
 ......Virgilian
 .......Lecompton Limestone
RTIowa
 Missouri
 Oklahoma
 Nebraska
 Kansas
 Beil Limestone Member
 Shawnee Group
SNIn Shawnee Group. Comprises Spring Branch Limestone, Doniphan Shale, Big Springs Limestone, Queen Hill Shale, Beil Limestone, King Hill Shale, Avoca Limestone members. E Kansas, NW Missouri, SE Nebraska, SW Iowa, central N Oklahoma.
Leczyca Poland  search
BTEurope
 .Central Europe
 ..Poland
 ...Plock Poland
 ....Leczyca Poland
SNTown in Plock Province, central Poland.
Leda Clay  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Leda Clay
RTCanada
 Ontario
 Ottawa Ontario
Ledbetter Slate  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Ordovician
 ....Ledbetter Slate
RTWashington
SNNE Washington. Added to Thesaurus in 1985.
Leduc Alberta  search
BTCanada
 .Western Canada
 ..Alberta
 ...Leduc Alberta
SNTown S of Edmonton in central Alberta.
Leduc Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Devonian
 ....Upper Devonian
 .....Frasnian
 ......Leduc Formation
SNIn Woodbend Group. Alberta and Saskatchewan. Added to Thesaurus in 1995.
Lee County Alabama  search
BTUnited States
 .Alabama
 ..Lee County Alabama
SNE Albama.
Lee County Arkansas  search
BTUnited States
 .Arkansas
 ..Lee County Arkansas
SNE Arkansas.
Lee County Florida  search
BTUnited States
 .Florida
 ..Lee County Florida
NTSanibel Island
SNOn Gulf of Mexico in SW Florida.
Lee County Georgia  search
BTUnited States
 .Georgia
 ..Lee County Georgia
SNSW central Georgia.
Lee County Illinois  search
BTUnited States
 .Illinois
 ..Lee County Illinois
SNN Illinois.
Lee County Iowa  search
BTUnited States
 .Iowa
 ..Lee County Iowa
SNExtreme SE Iowa.
Lee County Kentucky  search
BTUnited States
 .Kentucky
 ..Lee County Kentucky
SNE central Kentucky.
Lee County Mississippi  search
BTUnited States
 .Mississippi
 ..Lee County Mississippi
SNNE Mississippi.
Lee County North Carolina  search
BTUnited States
 .North Carolina
 ..Lee County North Carolina
SNCentral North Carolina.
Lee County South Carolina  search
BTUnited States
 .South Carolina
 ..Lee County South Carolina
SNNE central South Carolina.
Lee County Texas  search
BTUnited States
 .Texas
 ..Lee County Texas
SNS central Texas.
Lee County Virginia  search
BTUnited States
 .Virginia
 ..Lee County Virginia
SNExtreme SW Virginia.
Lee Creek Mine  search
BTUnited States
 .North Carolina
 ..Beaufort County North Carolina
 ...Lee Creek Mine
RTmines
 phosphate deposits
SNE North Carolina. Added to Thesaurus in 1989.
Lee Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Pennsylvanian
 .....Lower Pennsylvanian
 ......Lee Formation
RTVirginia
 Kentucky
 Tennessee
SNIncludes Rockcastle Sandstone. Defined as all of lower Pennsylvanian rocks from Mississippian-Pennsylvanian contact to top of Zachariah Coal Bed. E Kentucky, E Tennessee, and SW Virginia.
Leech River Fault  search
BTNorth America
 .Leech River Fault
RTWashington
 British Columbia
 Vancouver Island
SNVancouver Island, British Columbia; NW Washington. Indexed with British Columbia and/or Washington as applicable. Added to Thesaurus in 1989.
Leeds County Ontario  search
BTCanada
 .Eastern Canada
 ..Ontario
 ...Leeds County Ontario
Leelanau County Michigan  search
BTUnited States
 .Michigan
 ..Michigan Lower Peninsula
 ...Leelanau County Michigan
Leeward Islands  search
RTGuadeloupe
 La Grande Soufriere
 Lesser Antilles
 Montserrat
 Netherlands Antilles
 Saint John Island
 Society Islands
SNThe northern chain of islands in the Lesser Antilles extending from the Virgin Islands in N to Dominica in S. Also occurs in Society Islands, French Polynesia, Search in combination with Lesser Antilles or Society Islands. Indexed with Lesser Antilles or
Leflore County Mississippi  search
BTUnited States
 .Mississippi
 ..Leflore County Mississippi
left-lateral faults  search
BTfaults
 .lateral faults
 ..left-lateral faults
RTright-lateral faults
 strike-slip faults
SNAdded to Thesaurus in 1985.
Leg  search
Leg 1  search
BTDeep Sea Drilling Project
 .Leg 1
NTDSDP Site 1
 DSDP Site 2
 DSDP Site 3
 DSDP Site 4
 DSDP Site 5
 DSDP Site 6
 DSDP Site 7
RTGulf of Mexico
 North Atlantic
SNGulf of Mexico and NW Atlantic Ocean, off Florida and SW of Bermuda. Sites 1-7. Added to Thesaurus in 1981.
Leg 10  search
BTDeep Sea Drilling Project
 .Leg 10
NTDSDP Site 85
 DSDP Site 86
 DSDP Site 87
 DSDP Site 88
 DSDP Site 89
 DSDP Site 90
 DSDP Site 91
 DSDP Site 92
 DSDP Site 93
 DSDP Site 94
 DSDP Site 95
 DSDP Site 96
 DSDP Site 97
RTGulf of Mexico
 Campeche Scarp
SNGulf of Mexico. Sites 85-97. Added to Thesaurus in 1981.
Leg 100  search
BTOcean Drilling Program
 .Leg 100
NTODP Site 625
RTGulf of Mexico
SNW of the Florida shelf in the Gulf of Mexico. Site 625. First cruise of the Ocean Drilling Program (ODP), the continuation of DSDP and IPOD. Added to Thesaurus in 1989.
Leg 101  search
BTOcean Drilling Program
 .Leg 101
NTODP Site 626
 ODP Site 627
 ODP Site 628
 ODP Site 629
 ODP Site 630
 ODP Site 631
 ODP Site 632
 ODP Site 633
 ODP Site 634
 ODP Site 635
 ODP Site 636
RTNorth Atlantic
 Bahamas
 Exuma Sound
 Little Bahama Bank
 Northwest Providence Channel
 Blake Plateau
 Straits of Florida
SNBahamas carbonate platform, including Blake Plateau, Straits of Florida, Little Bahama Bank, Exuma Sound, and Northwest Providence Channel. Sites 626-636. Added to Thesaurus in 1989.
Leg 102  search
BTOcean Drilling Program
 .Leg 102
NTDSDP Site 418
RTBermuda Rise
SNNW Atlantic. Re-entry of DSDP Site 418. Added to Thesaurus in 1989.
Leg 103  search
BTOcean Drilling Program
 .Leg 103
NTODP Site 637
 ODP Site 638
 ODP Site 639
 ODP Site 640
 ODP Site 641
RTNorth Atlantic
 Iberian abyssal plain
 Leg 173
SNGalicia Bank margin, NW of Iberian Peninsula, NE Atlantic. Sites 637-641. Added to Thesaurus in 1989.
Leg 104  search
BTOcean Drilling Program
 .Leg 104
NTODP Site 642
 ODP Site 643
 ODP Site 644
RTVoring Plateau
SNVoring Plateau, Norwegian Sea. Sites 642-644. Added to Thesaurus in 1989.
Leg 105  search
BTOcean Drilling Program
 .Leg 105
NTODP Site 645
 ODP Site 646
 ODP Site 647
RTArctic Ocean
 Baffin Bay
 Labrador Sea
SNBaffin Bay and Labrador Sea. Sites 645-647. Added to Thesaurus in 1989.
Leg 106  search
BTOcean Drilling Program
 .Leg 106
NTODP Site 648
 ODP Site 649
RTNorth Atlantic
 Mid-Atlantic Ridge
 Leg 153
SNN Mid-Atlantic Ridge, S of Kane fracture zone. Sites 648-649. Added to Thesaurus in 1993.
Leg 107  search
BTOcean Drilling Program
 .Leg 107
NTODP Site 650
 ODP Site 651
 ODP Site 652
 ODP Site 653
 ODP Site 654
 ODP Site 655
 ODP Site 656
RTTyrrhenian Sea
 Tyrrhenian Basin
SNVavilov and Marsili basins, Tyrrhenian Sea, West Mediterranean. Sites 650-656. Added to Thesaurus in 1993.
Leg 108  search
BTOcean Drilling Program
 .Leg 108
NTODP Site 657
 ODP Site 658
 ODP Site 659
 ODP Site 660
 ODP Site 661
 ODP Site 662
 ODP Site 663
 ODP Site 664
 ODP Site 665
 ODP Site 666
 ODP Site 667
 ODP Site 668
RTNorth Atlantic
 South Atlantic
 Equatorial Atlantic
 ODP Site 958
SNE Equatorial Atlantic and NW margin of Africa, E Equatorial and SE Atlantic. ODP Sites 657-668. Added to Thesaurus in 1993.
Leg 109  search
BTOcean Drilling Program
 .Leg 109
NTDSDP Site 395
 ODP Site 648
 ODP Site 669
 ODP Site 670
RTNorth Atlantic
 Mid-Atlantic Ridge
 Kane fracture zone
 Leg 153
SNMid-Atlantic Ridge, S of Kane fracture zone in N Atlantic. Sites 669 and 670A; also re-entry of Sites 648 and 395A. Added to Thesaurus in 1989.
Leg 11  search
BTDeep Sea Drilling Project
 .Leg 11
NTDSDP Site 100
 DSDP Site 102
 DSDP Site 103
 DSDP Site 104
 DSDP Site 105
 DSDP Site 108
 DSDP Site 98
RTNorth Atlantic
 Bahamas
 Northeast Providence Channel
 Leg 172
 Blake-Bahama Outer Ridge
SNNW Atlantic Ocean. Sites 98-108, from N of the Bahamas to NW of Bermuda near the continental margin of the United States. Added to Thesaurus in 1981.
Leg 110  search
BTOcean Drilling Program
 .Leg 110
NTODP Site 671
 ODP Site 672
 ODP Site 673
 ODP Site 674
 ODP Site 675
 ODP Site 676
RTNorth Atlantic
 Leg 171A
 Barbados Ridge
 Leg 156
 Leg 78A
SNNear Tiburon Rise, E of Barbados in Barbados Forearc. Sites 671-676. Added to Thesaurus in 1989.
Leg 111  search
BTOcean Drilling Program
 .Leg 111
NTDSDP Site 504
 ODP Site 677
 ODP Site 678
RTNorthwest Pacific
 Equatorial Pacific
SNE Equatorial Pacific. Sites 677-678, plus DSDP Site 504B. Added to Thesaurus in 1989.
Leg 112  search
BTOcean Drilling Program
 .Leg 112
NTODP Site 679
 ODP Site 680
 ODP Site 681
 ODP Site 682
 ODP Site 683
 ODP Site 684
 ODP Site 685
 ODP Site 686
 ODP Site 687
 ODP Site 688
RTSoutheast Pacific
SNPeru continental margin. Sites 679-688. Added to Thesaurus in 1989.
Leg 113  search
BTOcean Drilling Program
 .Leg 113
NTODP Site 689
 ODP Site 690
 ODP Site 691
 ODP Site 692
 ODP Site 693
 ODP Site 694
 ODP Site 695
 ODP Site 696
 ODP Site 697
RTWeddell Sea
 Maud Rise
SNWeddell Sea, near Antarctica. Sites 689-697. Added to Thesaurus in 1989.
Leg 114  search
BTOcean Drilling Program
 .Leg 114
NTODP Site 698
 ODP Site 699
 ODP Site 700
 ODP Site 701
 ODP Site 702
 ODP Site 703
 ODP Site 704
RTSouth Atlantic
 Antarctic Ocean
 Georgia Basin
 Leg 177
 ODP Site 1091
 ODP Site 1092
SNIslas Orcadas Rise, Meteor Rise, South Georgia Rise. Sites 698-704. Added to Thesaurus in 1989.
Leg 115  search
BTOcean Drilling Program
 .Leg 115
NTODP Site 705
 ODP Site 706
 ODP Site 707
 ODP Site 708
 ODP Site 709
 ODP Site 710
 ODP Site 711
 ODP Site 712
 ODP Site 713
 ODP Site 714
 ODP Site 715
 ODP Site 716
RTIndian Ocean
SNChagos Bank, Madingley Rise, Maldives Ridge and Mascarene Plateau in central Indian Ocean. Sites 705-716. Added to Thesaurus in 1989.
Leg 116  search
BTOcean Drilling Program
 .Leg 116
NTODP Site 717
 ODP Site 718
 ODP Site 719
RTBengal Fan
SNDistal end of Bengal Fan in central Indian Ocean. Sites 717-719. Added to Thesaurus in 1989.
Leg 117  search
BTOcean Drilling Program
 .Leg 117
NTODP Site 720
 ODP Site 721
 ODP Site 722
 ODP Site 723
 ODP Site 724
 ODP Site 725
 ODP Site 726
 ODP Site 727
 ODP Site 728
 ODP Site 729
 ODP Site 730
 ODP Site 731
RTArabian Sea
 Indus Fan
SNIndus Fan, Owen Ridge, Oman continental margin, central Arabian Sea. Sites 720-731. Added to Thesaurus in 1993.
Leg 118  search
BTOcean Drilling Program
 .Leg 118
NTODP Site 732
 ODP Site 733
 ODP Site 734
 ODP Site 735
RTAtlantis II fracture zone
 Leg 176
 Southwest Indian Ridge
SNAtlantis II fracture zone, Southwest Indian Ridge, Indian Ocean. Sites 732-735. Added to Thesaurus in 1993.
Leg 119  search
BTOcean Drilling Program
 .Leg 119
NTODP Site 736
 ODP Site 737
 ODP Site 738
 ODP Site 739
 ODP Site 740
 ODP Site 741
 ODP Site 742
 ODP Site 743
 ODP Site 744
 ODP Site 745
 ODP Site 746
RTIndian Ocean
 Antarctic Ocean
 Kerguelen Plateau
 Prydz Bay
SNKerguelen Plateau and Prydz Bay, S Indian Ocean and Antarctic Ocean. Sites 736-746. Added to Thesaurus in 1989.
Leg 12  search
BTDeep Sea Drilling Project
 .Leg 12
NTDSDP Site 111
 DSDP Site 112
 DSDP Site 113
 DSDP Site 114
 DSDP Site 115
 DSDP Site 116
 DSDP Site 117
 DSDP Site 118
 DSDP Site 119
RTNorth Atlantic
 Labrador Sea
 Rockall Plateau
SNN Atlantic Ocean. Sites 111-119, from N of the Grand Banks to the Labrador Sea, to SW of Iceland, to W of Scotland, to N of Spain. Added to Thesaurus in 1981.
Leg 120  search
BTOcean Drilling Program
 .Leg 120
NTODP Site 747
 ODP Site 748
 ODP Site 749
 ODP Site 750
 ODP Site 751
RTIndian Ocean
 Antarctic Ocean
 Kerguelen Plateau
SNKerguelen Plateau, S Indian Ocean-Antarctic Ocean. Sites 747-751. Added to Thesaurus in 1993.
Leg 121  search
BTOcean Drilling Program
 .Leg 121
NTODP Site 752
 ODP Site 753
 ODP Site 754
 ODP Site 755
 ODP Site 756
 ODP Site 757
 ODP Site 758
RTIndian Ocean
 Broken Ridge
 Ninetyeast Ridge
SNBroken Ridge and Ninetyeast Ridge, Indian Ocean. Sites 752-758. Added to Thesaurus in 1993.
Leg 122  search
BTOcean Drilling Program
 .Leg 122
NTODP Site 759
 ODP Site 760
 ODP Site 761
 ODP Site 762
 ODP Site 763
 ODP Site 764
RTIndian Ocean
 Exmouth Plateau
 Wombat Plateau
SNExmouth Plateau and Wombat Plateau, E Indian Ocean. Sites 759-764. Added to Thesaurus in 1989.
Leg 123  search
BTOcean Drilling Program
 .Leg 123
NTODP Site 765
 ODP Site 766
RTIndian Ocean
 Argo abyssal plain
 Gascoyne abyssal plain
SNArgo abyssal plain and Gascoyne abyssal plain, E Indian Ocean. Sites 765-766. Added to Thesaurus in 1993.
Leg 124  search
BTOcean Drilling Program
 .Leg 124
NTODP Site 767
 ODP Site 768
 ODP Site 769
 ODP Site 770
 ODP Site 771
RTNorthwest Pacific
 Equatorial Pacific
 Celebes Sea
 Sulu Sea
SNCelebes Sea and Sulu Sea, NW Equatorial Pacific. Sites 767-771. Added to Thesaurus in 1993.
Leg 124E  search
BTOcean Drilling Program
 .Leg 124E
NTODP Site 772
 ODP Site 773
 ODP Site 774
 ODP Site 775
 ODP Site 776
 ODP Site 777
RTNorthwest Pacific
 South China Sea
 Philippine Sea
 Mariana Trough
 Mariana Trench
SNPhilippine Sea, South China Sea, and Mariana Trench-Trough area, NW Pacific. Sites 772-777. Added to Thesaurus in 1993.
Leg 125  search
BTOcean Drilling Program
 .Leg 125
NTODP Site 778
 ODP Site 779
 ODP Site 780
 ODP Site 781
 ODP Site 782
 ODP Site 783
 ODP Site 784
 ODP Site 785
 ODP Site 786
RTNorthwest Pacific
 Izu-Bonin Arc
 Conical Seamount
SNMariana and Izu-Bonin forearc regions, NW Pacific. Sites 778-786. Added to Thesaurus in 1993.
Leg 126  search
BTOcean Drilling Program
 .Leg 126
NTODP Site 787
 ODP Site 788
 ODP Site 789
 ODP Site 790
 ODP Site 791
 ODP Site 792
 ODP Site 793
RTIzu-Bonin Arc
 Philippine Sea
 Sumisu Rift
SNSumisu Rift and Izu-Bonin forearc basin, Izu-Bonin arc-trench system, NW Philippine Sea. Sites 787-793. Added to Thesaurus in 1993.
Leg 127  search
BTOcean Drilling Program
 .Leg 127
NTODP Site 794
 ODP Site 795
 ODP Site 796
 ODP Site 797
RTJapan Sea
 Yamato Basin
 Japan Basin
 Kita-Yamato Trough
 Yamato Rise
SNJapan Basin and Yamato Basin, E Japan Sea. Sites 794-797. Added to Thesaurus in 1993.
Leg 128  search
BTOcean Drilling Program
 .Leg 128
NTODP Site 794
 ODP Site 798
 ODP Site 799
RTJapan Sea
 Yamato Basin
 Japan Basin
 Kita-Yamato Trough
 Yamato Rise
 Oki Ridge
SNS Japan Sea. Sites 794, 798-799. Reentry of Hole 794C. Added to Thesaurus in 1993.
Leg 129  search
BTOcean Drilling Program
 .Leg 129
NTODP Site 800
 ODP Site 801
 ODP Site 802
RTNorthwest Pacific
 Mariana Trough
 East Mariana Basin
 Pigafetta Basin
SNPigafetta and East Mariana basins, NW Pacific. Sites 800-802. Added to Thesaurus in 1993.
Leg 13  search
BTDeep Sea Drilling Project
 .Leg 13
NTDSDP Site 120
 DSDP Site 121
 DSDP Site 122
 DSDP Site 123
 DSDP Site 124
 DSDP Site 125
 DSDP Site 126
 DSDP Site 127
 DSDP Site 128
 DSDP Site 129
 DSDP Site 130
 DSDP Site 131
 DSDP Site 132
 DSDP Site 133
 DSDP Site 134
RTEast Mediterranean
 Alboran Sea
 West Mediterranean
 North Atlantic
 Balearic Basin
 Mediterranean Sea
 Bannock Basin
 Tyrrhenian Sea
 Valencia Trough
 Hellenic Trench
 Strabo Trench
SNMediterranean Sea. Sites 120-134. (Site 120 is nearby in the Atlantic Ocean.). Added to Thesaurus in 1981.
Leg 130  search
BTOcean Drilling Program
 .Leg 130
NTODP Site 803
 ODP Site 804
 ODP Site 805
 ODP Site 806
 ODP Site 807
RTNorthwest Pacific
 Equatorial Pacific
 Ontong Java Plateau
SNOntong Java Plateau, NW Equatorial Pacific. Sites 803-807. Added to Thesaurus in 1993.
Leg 131  search
BTOcean Drilling Program
 .Leg 131
NTODP Site 808
RTNorthwest Pacific
SNNankai accretionary prism, SE of Shikoku, Japan, NW Pacific. Site 808. Added to Thesaurus in 1993.
Leg 132  search
BTOcean Drilling Program
 .Leg 132
NTODP Site 808
 ODP Site 809
 ODP Site 810
RTNorthwest Pacific
 Philippine Sea
 Shatsky Rise
SNNW Philippine Sea and Shatsky Rise, NW Pacific. Sites 808-810. Added to Thesaurus in 1993.
Leg 133  search
BTOcean Drilling Program
 .Leg 133
NTODP Site 811
 ODP Site 812
 ODP Site 813
 ODP Site 814
 ODP Site 815
 ODP Site 816
 ODP Site 817
 ODP Site 818
 ODP Site 819
 ODP Site 820
 ODP Site 821
 ODP Site 822
 ODP Site 823
 ODP Site 824
 ODP Site 826
RTCoral Sea
 Queensland Plateau
SNW Coral Sea, SW Pacific. Sites 811-826. Added to Thesaurus in 1993.
Leg 134  search
BTOcean Drilling Program
 .Leg 134
NTODP Site 827
 ODP Site 828
 ODP Site 829
 ODP Site 830
 ODP Site 831
 ODP Site 832
 ODP Site 833
RTSouthwest Pacific
 Vanuatu
SND'Entrecasteaux Zone and New Hebrides island arc, Vanuatu region, SW Pacific. Sites 827-833. Added to Thesaurus in 1993.
Leg 135  search
BTOcean Drilling Program
 .Leg 135
NTODP Site 834
 ODP Site 835
 ODP Site 836
 ODP Site 837
 ODP Site 838
 ODP Site 839
 ODP Site 840
 ODP Site 841
RTSoutheast Pacific
 Lau Basin
SNLau Basin and Tonga Ridge, SE Pacific. Sites 834-841. Added to Thesaurus in 1993.
Leg 136  search
BTOcean Drilling Program
 .Leg 136
NTODP Site 842
 ODP Site 843
RTNortheast Pacific
SNAbout 350 km S of the Hawaiian Islands, NE Pacific. Sites 842-843. Added to Thesaurus in 1993.
Leg 137  search
BTOcean Drilling Program
 .Leg 137
NTDSDP Site 504
RTNortheast Pacific
 Equatorial Pacific
SNReturn to Hole 504B, E Equatorial Pacific, off Colombia. Added to Thesaurus in 1995.
Leg 138  search
BTOcean Drilling Program
 .Leg 138
NTODP Site 844
 ODP Site 845
 ODP Site 846
 ODP Site 847
 ODP Site 848
 ODP Site 849
 ODP Site 850
 ODP Site 851
 ODP Site 852
 ODP Site 853
 ODP Site 854
RTNortheast Pacific
 Southeast Pacific
 East Pacific
 Equatorial Pacific
SNTransect in Galapagos Islands-East Pacific Rise area and transect 650-1000 km west of the East Pacific Rise, E Equatorial Pacific. Sites 844-854. Added to Thesaurus in 1993.
Leg 139  search
BTOcean Drilling Program
 .Leg 139
NTODP Site 855
 ODP Site 856
 ODP Site 857
 ODP Site 858
RTJuan de Fuca Ridge
 Leg 169
 ODP Site 1035
 ODP Site 1036
SNMiddle Valley Rift, Juan de Fuca Ridge, NE Pacific. Sites 855-858. Added to Thesaurus in 1995.
Leg 14  search
BTDeep Sea Drilling Project
 .Leg 14
NTDSDP Site 135
 DSDP Site 136
 DSDP Site 137
 DSDP Site 138
 DSDP Site 139
 DSDP Site 140
 DSDP Site 141
 DSDP Site 142
 DSDP Site 143
 DSDP Site 144
RTNorth Atlantic
SNN Atlantic Ocean off the coasts of Africa and South America. Sites 135-144. Added to Thesaurus in 1981.
Leg 140  search
BTOcean Drilling Program
 .Leg 140
NTDSDP Site 504
RTNortheast Pacific
 Equatorial Pacific
SNReturn to Hole 504B, E Equatorial Pacific, off Colombia. Added to Thesaurus in 1995.
Leg 141  search
BTOcean Drilling Program
 .Leg 141
NTODP Site 859
 ODP Site 860
 ODP Site 861
 ODP Site 862
 ODP Site 863
RTChile Margin Triple Junction
 Southeast Pacific
 Peru-Chile Trench
SNChile Margin Triple Junction, SE Pacific. Sites 859-863. Added to Thesaurus in 1995.
Leg 142  search
BTOcean Drilling Program
 .Leg 142
NTODP Site 864
RTNortheast Pacific
 Equatorial Pacific
 East Pacific Rise
SNEast Pacific Rise, E Equatorial Pacific. Site 864. Added to Thesaurus in 1995.
Leg 143  search
BTOcean Drilling Program
 .Leg 143
NTODP Site 865
 ODP Site 866
 ODP Site 867
 ODP Site 868
 ODP Site 869
 ODP Site 870
RTNorth Pacific
 Northeast Pacific
 Northwest Pacific
 Resolution Seamount
 Mid-Pacific Mountains
 Marshall Islands
 Wodejebato Seamount
SNNorthwest Pacific seamounts, Mid-Pacific Mountains and Marshall Islands region. Sites 865-870. Added to Thesaurus in 1995.
Leg 144  search
BTOcean Drilling Program
 .Leg 144
NTODP Site 801
 ODP Site 871
 ODP Site 872
 ODP Site 873
 ODP Site 874
 ODP Site 875
 ODP Site 876
 ODP Site 877
 ODP Site 878
 ODP Site 879
 ODP Site 880
RTMarshall Islands
 Pigafetta Basin
 Wodejebato Seamount
SNCentral Pigafetta Basin and Marshall Islands region, west-central Pacific. Reentry of Hole 801C and Sites 871-880. Added to Thesaurus in 1995.
Leg 145  search
BTOcean Drilling Program
 .Leg 145
NTODP Site 881
 ODP Site 882
 ODP Site 883
 ODP Site 884
 ODP Site 885
 ODP Site 886
 ODP Site 887
RTNorth Pacific
 Northeast Pacific
 Northwest Pacific
SNNorth Pacific transect from W Pacific to Patton-Murray seamounts, S of Gulf of Alaska. Sites 881-887. Added to Thesaurus in 1995.
Leg 146  search
BTOcean Drilling Program
 .Leg 146
NTODP Site 857
 ODP Site 888
 ODP Site 889
 ODP Site 890
 ODP Site 891
 ODP Site 892
 ODP Site 893
RTNortheast Pacific
 Juan de Fuca Ridge
 Vancouver Island
 Cascadia subduction zone
 Leg 168
 Santa Barbara Basin
 Leg 167
SNCascadia margin, NE Pacific. Sites 857, 888-893. Added to Thesaurus in 1995.
Leg 147  search
BTOcean Drilling Program
 .Leg 147
NTODP Site 894
 ODP Site 895
RTNortheast Pacific
 Equatorial Pacific
 Galapagos Rift
 Hess Deep
SNHess Deep intra-rift ridge, Galapagos Rift, E Equatorial Pacific. Sites 894-895. Added to Thesaurus in 1995.
Leg 148  search
BTOcean Drilling Program
 .Leg 148
NTDSDP Site 504
 ODP Site 896
RTNortheast Pacific
 Equatorial Pacific
 Costa Rica Rift
 Leg 9
SNReturn to Hole 504B, Costa Rica Rift, E Equatorial Pacific, off Colombia. Also Site 896. Added to Thesaurus in 1995.
Leg 149  search
BTOcean Drilling Program
 .Leg 149
NTODP Site 897
 ODP Site 898
 ODP Site 899
 ODP Site 900
 ODP Site 901
RTNorth Atlantic
 Iberian abyssal plain
 Leg 173
SNIberian abyssal plain, NE Atlantic. Sites 897-901. Added to Thesaurus in 1995.
Leg 15  search
BTDeep Sea Drilling Project
 .Leg 15
NTDSDP Site 146
 DSDP Site 147
 DSDP Site 148
 DSDP Site 149
 DSDP Site 150
 DSDP Site 151
 DSDP Site 152
 DSDP Site 153
 DSDP Site 154
RTCaribbean Sea
 Aves Ridge
 Beata Ridge
 Colombian Basin
 Venezuelan Basin
 Nicaragua Rise
SNCaribbean Sea. Sites 145-154. Added to Thesaurus in 1981.
Leg 150  search
BTOcean Drilling Program
 .Leg 150
NTODP Site 902
 ODP Site 903
 ODP Site 904
 ODP Site 905
 ODP Site 906
RTNorth Atlantic
 Leg 174A
SNNew Jersey continental margin, NW Atlantic. Sites 902-906. Added to Thesaurus in 1995.
Leg 151  search
BTOcean Drilling Program
 .Leg 151
NTODP Site 907
 ODP Site 908
 ODP Site 909
 ODP Site 910
 ODP Site 911
 ODP Site 912
 ODP Site 913
RTArctic Ocean
 North Atlantic
 Norwegian Sea
 Fram Strait
 Yermak Plateau
SNN Atlantic to Arctic transect. Sites 907-913. Added to Thesaurus in 1995.
Leg 152  search
BTOcean Drilling Program
 .Leg 152
NTODP Site 914
 ODP Site 915
 ODP Site 916
 ODP Site 917
 ODP Site 918
 ODP Site 919
RTGreenland
 North Atlantic
 Leg 163
 ODP Site 989
SNSE Greenland continental margin. Sites 914-919.
Leg 153  search
BTOcean Drilling Program
 .Leg 153
NTODP Site 920
 ODP Site 921
 ODP Site 922
 ODP Site 923
 ODP Site 924
RTNorth Atlantic
 Mid-Atlantic Ridge
 Leg 109
 Kane fracture zone
 ODP Site 669
 Leg 106
 ODP Site 648
 ODP Site 649
SNWestern median valley wall, Mid-Atlantic Ridge S of Kane Transform (MARK). Sites 920-924.
Leg 154  search
BTOcean Drilling Program
 .Leg 154
NTODP Site 925
 ODP Site 926
 ODP Site 927
 ODP Site 928
 ODP Site 929
RTLeg 39
 Mid-Atlantic Ridge
 Equatorial Atlantic
 DSDP Site 354
SNCeara Rise, off the Amazon Fan, Equatorial Atlantic. Sites 925-929.
Leg 155  search
BTOcean Drilling Program
 .Leg 155
NTODP Site 930
 ODP Site 931
 ODP Site 932
 ODP Site 933
 ODP Site 934
 ODP Site 935
 ODP Site 936
 ODP Site 937
 ODP Site 938
 ODP Site 939
 ODP Site 940
 ODP Site 941
 ODP Site 942
 ODP Site 943
 ODP Site 944
 ODP Site 945
 ODP Site 946
RTEquatorial Atlantic
 Northwest Atlantic
SNAmazon Canyons, W Equatorial Atlantic, off Brazil. Sites 930-946.
Leg 156  search
BTOcean Drilling Program
 .Leg 156
NTODP Site 947
 ODP Site 948
 ODP Site 949
RTLeg 171A
 Barbados Ridge
 DSDP Site 541
 Leg 110
 Leg 78A
 ODP Site 671
SNNorthern Barbados accretionary prism convergent margin, NW Atlantic. Sites 947-949.
Leg 157  search
BTOcean Drilling Program
 .Leg 157
NTODP Site 950
 ODP Site 951
 ODP Site 952
 ODP Site 953
 ODP Site 954
 ODP Site 955
 ODP Site 956
RTCanary Islands
 DSDP Site 397
 Leg 47
 DSDP Site 398
 Madeira abyssal plain
SNCanary Islands and Madeira abyssal plain, NE Atlantic. Sites 950-956.
Leg 158  search
BTOcean Drilling Program
 .Leg 158
NTODP Site 957
RTNorth Atlantic
 Mid-Atlantic Ridge
 TAG hydrothermal field
SNTAG hydrothermal field, N Mid-Atlantic Ridge. Site 957.
Leg 159  search
BTOcean Drilling Program
 .Leg 159
NTODP Site 959
 ODP Site 960
 ODP Site 961
 ODP Site 962
RTEquatorial Atlantic
SNIvory Coast-Ghana transform continental margin, E Equatorial Atlantic. Sites 959-962.
Leg 159T  search
BTOcean Drilling Program
 .Leg 159T
NTODP Site 958
RTNorth Atlantic
SNE Canary Basin, NE Atlantic. Site 958.
Leg 16  search
BTDeep Sea Drilling Project
 .Leg 16
NTDSDP Site 155
 DSDP Site 156
 DSDP Site 157
 DSDP Site 158
 DSDP Site 159
 DSDP Site 160
 DSDP Site 161
 DSDP Site 162
 DSDP Site 163
RTNortheast Pacific
 Southeast Pacific
 Carnegie Ridge
 Equatorial Pacific
 Cocos Ridge
 East Pacific Rise
SNE Equatorial Pacific. Sites 155-163. Added to Thesaurus in 1981.
Leg 160  search
BTOcean Drilling Program
 .Leg 160
NTODP Site 963
 ODP Site 964
 ODP Site 965
 ODP Site 966
 ODP Site 967
 ODP Site 968
 ODP Site 969
 ODP Site 970
 ODP Site 971
 ODP Site 972
 ODP Site 973
RTEast Mediterranean
 Mediterranean Ridge
SNIonian Basin, Mediterranean Ridge, and Eratosthenes Seamount, East Mediterranean. Sites 963-973.
Leg 161  search
BTOcean Drilling Program
 .Leg 161
NTODP Site 974
 ODP Site 975
 ODP Site 976
 ODP Site 977
 ODP Site 978
 ODP Site 979
RTAlboran Sea
 West Mediterranean
 Tyrrhenian Sea
 Minorca Rise
SNTyrrhenian Sea, Minorca Rise, and Alboran Sea, West Mediterranean. Sites 974-979.
Leg 162  search
BTOcean Drilling Program
 .Leg 162
NTODP Site 907
 ODP Site 980
 ODP Site 981
 ODP Site 982
 ODP Site 983
 ODP Site 984
 ODP Site 985
 ODP Site 986
 ODP Site 987
RTNorth Atlantic
 Norwegian Sea
SNArctic Gateways, N Atlantic (including Norwegian Sea). Sites 907, 980-987.
Leg 163  search
BTOcean Drilling Program
 .Leg 163
NTODP Site 988
 ODP Site 989
 ODP Site 990
RTNorth Atlantic
 Leg 152
SNSE Greenland continental shelf, S Denmark Strait, N Atlantic. Sites 988-990.
Leg 164  search
BTOcean Drilling Program
 .Leg 164
NTODP Site 991
 ODP Site 992
 ODP Site 993
 ODP Site 994
 ODP Site 995
 ODP Site 996
 ODP Site 997
RTLeg 172
 Blake-Bahama Outer Ridge
 Northwest Atlantic
SNBlake-Bahama Outer Ridge and Cape Fear Slide of Carolina Rise, NW Atlantic. Sites 991-997.
Leg 165  search
BTOcean Drilling Program
 .Leg 165
NTODP Site 1000
 ODP Site 1001
 ODP Site 1002
 ODP Site 998
 ODP Site 999
RTCaribbean Sea
SNCaribbean Sea. Sites 998-1002.
Leg 166  search
BTOcean Drilling Program
 .Leg 166
NTODP Site 1003
 ODP Site 1004
 ODP Site 1005
 ODP Site 1006
 ODP Site 1007
 ODP Site 1008
 ODP Site 1009
RTGreat Bahama Bank
 Northwest Atlantic
 Straits of Florida
SNGreat Bahama Bank, Straits of Florida, NW Atlantic. Sites 1003-1009.
Leg 167  search
BTOcean Drilling Program
 .Leg 167
NTODP Site 1010
 ODP Site 1011
 ODP Site 1012
 ODP Site 1013
 ODP Site 1014
 ODP Site 1015
 ODP Site 1016
 ODP Site 1017
 ODP Site 1018
 ODP Site 1019
 ODP Site 1020
 ODP Site 1021
 ODP Site 1022
RTNortheast Pacific
 Leg 146
 ODP Site 893
SNCalifornia margin, NE Pacific. Sites 1010-1022.
Leg 168  search
BTOcean Drilling Program
 .Leg 168
NTODP Site 1023
 ODP Site 1024
 ODP Site 1025
 ODP Site 1026
 ODP Site 1027
 ODP Site 1028
 ODP Site 1029
 ODP Site 1030
 ODP Site 1031
 ODP Site 1032
RTJuan de Fuca Ridge
 Northwest Pacific
 Cascadia Basin
 Leg 146
SNCascadia Basin, E flank Juan de Fuca Ridge, NW Pacific. Sites 1023-1032.
Leg 169  search
BTOcean Drilling Program
 .Leg 169
NTODP Site 1035
 ODP Site 1036
 ODP Site 1037
 ODP Site 1038
 ODP Site 856
 ODP Site 858
RTNortheast Pacific
 Juan de Fuca Ridge
 Escanaba Trough
 Leg 139
SNMiddle Valley of the N Juan de Fuca Ridge area and Escanaba Trough, NE Pacific. Sites 1035-1038. Holes from sites 856 and 858 were re-entered.
Leg 169S  search
BTOcean Drilling Program
 .Leg 169S
NTODP Site 1033
 ODP Site 1034
RTBritish Columbia
 Vancouver Island
 Saanich Inlet
SNSaanich Inlet, SE Vancouver Island, SW British Columbia. Sites 1033-1034.
Leg 17  search
BTDeep Sea Drilling Project
 .Leg 17
NTDSDP Site 164
 DSDP Site 165
 DSDP Site 166
 DSDP Site 167
 DSDP Site 168
 DSDP Site 169
 DSDP Site 170
 DSDP Site 171
RTNorth Pacific
 Northeast Pacific
 Northwest Pacific
 Equatorial Pacific
SNN central and Equatorial Pacific. Sites 164-171. Added to Thesaurus in 1981.
Leg 170  search
BTOcean Drilling Program
 .Leg 170
NTODP Site 1039
 ODP Site 1040
 ODP Site 1041
 ODP Site 1042
 ODP Site 1043
RTNortheast Pacific
 Leg 84
 Middle America Trench
SNCosta Rica margin, Middle America Trench region, NE Pacific. Sites 1039-1043.
Leg 171A  search
BTOcean Drilling Program
 .Leg 171A
NTODP Site 1044
 ODP Site 1045
 ODP Site 1046
 ODP Site 1047
 ODP Site 1048
RTNorth Atlantic
 Barbados
 Leg 110
 Leg 156
 Leg 78A
 Blake Nose
SNNorthern Barbados accretionary prism, NW Atlantic. Sites 1044-1048.
Leg 171B  search
BTOcean Drilling Program
 .Leg 171B
NTODP Site 1049
 ODP Site 1050
 ODP Site 1051
 ODP Site 1052
 ODP Site 1053
RTNorth Atlantic
 Blake Nose
 Leg 44
SNBlake Nose transect, NW Atlantic. Sites 1049-1053.
Leg 172  search
BTOcean Drilling Program
 .Leg 172
NTODP Site 1054
 ODP Site 1055
 ODP Site 1056
 ODP Site 1057
 ODP Site 1058
 ODP Site 1059
 ODP Site 1060
 ODP Site 1061
 ODP Site 1062
 ODP Site 1063
 ODP Site 1064
RTNorth Atlantic
 Leg 11
 Bermuda Rise
 Blake-Bahama Outer Ridge
 Leg 164
 Sohm abyssal plain
 Leg 76
SNBlake-Bahama Outer Ridge, Carolina Slope, Sohm abyssal plain, and Bermuda Rise, NW Atlantic. Sites 1054-1064.
Leg 173  search
BTOcean Drilling Program
 .Leg 173
NTODP Site 1065
 ODP Site 1067
 ODP Site 1068
 ODP Site 1069
 ODP Site 1070
RTNorth Atlantic
 Leg 47
 Iberian abyssal plain
 Leg 103
 Leg 149
SNW Iberia continental margin, NE Atlantic. Sites 1065-1070.
Leg 174A  search
BTOcean Drilling Program
 .Leg 174A
NTODP Site 1071
 ODP Site 1072
 ODP Site 1073
RTNorth Atlantic
 Leg 150
SNNew Jersey continental margin, NW Atlantic. Sites 1071-1073.
Leg 174B  search
BTOcean Drilling Program
 .Leg 174B
NTDSDP Site 395
 ODP Site 1074
RTNorth Atlantic
 Mid-Atlantic Ridge
SNN central Atlantic Ocean near the Mid-Atlantic Ridge axis. Site 1074. Hole 395A was reentered.
Leg 175  search
BTOcean Drilling Program
 .Leg 175
NTODP Site 1075
 ODP Site 1076
 ODP Site 1077
 ODP Site 1078
 ODP Site 1079
 ODP Site 1080
 ODP Site 1081
 ODP Site 1082
 ODP Site 1083
 ODP Site 1084
 ODP Site 1085
 ODP Site 1086
 ODP Site 1087
RTSouth Atlantic
 Leg 40
 Leg 75
SNSE Atlantic Ocean. Sites 1075-1087.
Leg 176  search
BTOcean Drilling Program
 .Leg 176
NTODP Site 735
RTAtlantis II fracture zone
 Leg 118
 Southwest Indian Ridge
SNAtlantis II fracture zone, Southwest Indian Ridge, Indian Ocean. Return to Site 735, Hole B.
Leg 177  search
BTOcean Drilling Program
 .Leg 177
NTODP Site 1088
 ODP Site 1089
 ODP Site 1090
 ODP Site 1091
 ODP Site 1092
 ODP Site 1093
 ODP Site 1094
RTSouth Atlantic
 Leg 114
SNSE Atlantic. Sites 1088-1094.
Leg 18  search
BTDeep Sea Drilling Project
 .Leg 18
NTDSDP Site 172
 DSDP Site 173
 DSDP Site 174
 DSDP Site 175
 DSDP Site 176
 DSDP Site 177
 DSDP Site 178
 DSDP Site 179
 DSDP Site 180
 DSDP Site 181
 DSDP Site 182
RTNortheast Pacific
SNNE Pacific Ocean. Sites 172-182, from off California and Oregon to the Gulf of Alaska.
Leg 19  search
BTDeep Sea Drilling Project
 .Leg 19
NTDSDP Site 183
 DSDP Site 184
 DSDP Site 185
 DSDP Site 186
 DSDP Site 187
 DSDP Site 188
 DSDP Site 189
 DSDP Site 190
 DSDP Site 191
 DSDP Site 192
 DSDP Site 193
RTAleutian Trench
 Bering Sea
 North Pacific
SNBering Sea and N Pacific Ocean. Sites 183-193, roughly following Aleutian Trench to E of the Kuril Trench. Added to Thesaurus in 1981.
Leg 2  search
BTDeep Sea Drilling Project
 .Leg 2
NTDSDP Site 10
 DSDP Site 11
 DSDP Site 12
 DSDP Site 8
 DSDP Site 9
RTNorth Atlantic
SNN Atlantic Ocean. Sites 8-12, from NW of Bermuda to NW of Cape Verde Islands. Added to Thesaurus in 1981.
Leg 20  search
BTDeep Sea Drilling Project
 .Leg 20
NTDSDP Site 194
 DSDP Site 195
 DSDP Site 196
 DSDP Site 197
 DSDP Site 198
 DSDP Site 199
 DSDP Site 200
 DSDP Site 202
RTNorthwest Pacific
 Equatorial Pacific
SNNW Pacific Ocean. Sites 194-202, from E of the Japan and Bonin trenches, to E of the Mariana Trench, and W of the Marshall Islands. Added to Thesaurus in 1981.
Leg 21  search
BTDeep Sea Drilling Project
 .Leg 21
NTDSDP Site 203
 DSDP Site 204
 DSDP Site 205
 DSDP Site 206
 DSDP Site 207
 DSDP Site 208
 DSDP Site 209
 DSDP Site 210
RTSouth Pacific
 Southwest Pacific
 Tasman Sea
 Southeast Pacific
 Coral Sea
 Lord Howe Rise
 Queensland Plateau
SNSW Pacific Ocean. Sites 203-210, primarily W of the Tonga and Kermadec trenches and New Zealand, and in the Coral Sea. Added to Thesaurus in 1981.
Leg 22  search
BTDeep Sea Drilling Project
 .Leg 22
NTDSDP Site 211
 DSDP Site 212
 DSDP Site 213
 DSDP Site 214
 DSDP Site 215
 DSDP Site 216
 DSDP Site 217
 DSDP Site 218
RTIndian Ocean
 Wharton Basin
 Ninetyeast Ridge
SNE Indian Ocean. Sites 211-218. Added to Thesaurus in 1981.
Leg 23  search
BTDeep Sea Drilling Project
 .Leg 23
NTDSDP Site 219
 DSDP Site 220
 DSDP Site 221
 DSDP Site 222
 DSDP Site 223
 DSDP Site 224
 DSDP Site 225
 DSDP Site 226
 DSDP Site 227
 DSDP Site 228
 DSDP Site 229
 DSDP Site 230
RTIndian Ocean
 Arabian Sea
 Red Sea
SNArabian Sea and Red Sea. Sites 219-230. Added to Thesaurus in 1981.
Leg 24  search
BTDeep Sea Drilling Project
 .Leg 24
NTDSDP Site 231
 DSDP Site 232
 DSDP Site 233
 DSDP Site 234
 DSDP Site 235
 DSDP Site 236
 DSDP Site 237
 DSDP Site 238
RTIndian Ocean
 Gulf of Aden
 Somali Basin
SNW Indian Ocean and Gulf of Aden. Sites 231-238. Added to Thesaurus in 1981.
Leg 25  search
BTDeep Sea Drilling Project
 .Leg 25
NTDSDP Site 239
 DSDP Site 240
 DSDP Site 241
 DSDP Site 242
 DSDP Site 243
 DSDP Site 244
 DSDP Site 245
 DSDP Site 246
 DSDP Site 247
 DSDP Site 248
 DSDP Site 249
RTIndian Ocean
 Madagascar Basin
SNW Indian Ocean. Sites 239-249.
Leg 26  search
BTDeep Sea Drilling Project
 .Leg 26
NTDSDP Site 250
 DSDP Site 251
 DSDP Site 252
 DSDP Site 253
 DSDP Site 254
 DSDP Site 255
 DSDP Site 256
 DSDP Site 257
 DSDP Site 258
RTIndian Ocean
 Broken Ridge
 Wharton Basin
 Ninetyeast Ridge
 Naturaliste Plateau
SNS Indian Ocean. Sites 250-258. Added to Thesaurus in 1981.
Leg 27  search
BTDeep Sea Drilling Project
 .Leg 27
NTDSDP Site 259
 DSDP Site 260
 DSDP Site 261
 DSDP Site 262
 DSDP Site 263
RTIndian Ocean
 Perth abyssal plain
SNE Indian Ocean. Sites 259-263.
Leg 28  search
BTDeep Sea Drilling Project
 .Leg 28
NTDSDP Site 264
 DSDP Site 265
 DSDP Site 266
 DSDP Site 267
 DSDP Site 268
 DSDP Site 269
 DSDP Site 270
 DSDP Site 271
 DSDP Site 272
 DSDP Site 273
 DSDP Site 274
RTIndian Ocean
 Antarctic Ocean
 Southeast Indian Ridge
 Naturaliste Plateau
 Ross Sea
SNE Indian Ocean, and Antarctic Ocean S of Australia and New Zealand. Sites 264-274. Added to Thesaurus in 1981.
Leg 29  search
BTDeep Sea Drilling Project
 .Leg 29
NTDSDP Site 275
 DSDP Site 276
 DSDP Site 277
 DSDP Site 278
 DSDP Site 279
 DSDP Site 280
 DSDP Site 281
 DSDP Site 282
 DSDP Site 283
 DSDP Site 284
RTAntarctic Ocean
 Southwest Pacific
 DSDP Site 593
SNPacific and Antarctic oceans, S of Australia and New Zealand. Sites 275-284. Added to Thesaurus in 1981.
Leg 3  search
BTDeep Sea Drilling Project
 .Leg 3
NTDSDP Site 13
 DSDP Site 14
 DSDP Site 15
 DSDP Site 16
 DSDP Site 17
 DSDP Site 18
 DSDP Site 19
 DSDP Site 20
 DSDP Site 21
 DSDP Site 22
RTSouth Atlantic
 Brazil Basin
 Mid-Atlantic Ridge
SNS Atlantic Ocean. Sites 13-22, primarily spanning the Mid-Atlantic Ridge at approximately S30#DG, W to the Rio Grande Rise. Added to Thesaurus in 1981.
Leg 30  search
BTDeep Sea Drilling Project
 .Leg 30
NTDSDP Site 285
 DSDP Site 286
 DSDP Site 287
 DSDP Site 288
 DSDP Site 289
RTSouthwest Pacific
 Coral Sea
 Vanuatu
 Ontong Java Plateau
SNSW Pacific Ocean. Sites 285-289 in the South Fiji Basin, Vanuatu, Coral Sea, and Ontong Java Plateau. Added to Thesaurus in 1981.
Leg 31  search
BTDeep Sea Drilling Project
 .Leg 31
NTDSDP Site 290
 DSDP Site 291
 DSDP Site 292
 DSDP Site 293
 DSDP Site 294
 DSDP Site 295
 DSDP Site 296
 DSDP Site 297
 DSDP Site 298
 DSDP Site 299
 DSDP Site 300
 DSDP Site 301
 DSDP Site 302
RTNorthwest Pacific
 Philippine Sea
 West Philippine Basin
 Japan Sea
 Yamato Basin
SNJapan Sea and W Philippine Sea. Sites 290-302. Added to Thesaurus in 1981.
Leg 32  search
BTDeep Sea Drilling Project
 .Leg 32
NTDSDP Site 303
 DSDP Site 304
 DSDP Site 305
 DSDP Site 306
 DSDP Site 307
 DSDP Site 308
 DSDP Site 309
 DSDP Site 310
 DSDP Site 311
 DSDP Site 312
 DSDP Site 313
RTNorthwest Pacific
SNNW Pacific Ocean. Sites 303-313, from E of the Kuril and Bonin trenches to the Emperor Seamounts and the Necker Ridge. Added to Thesaurus in 1981.
Leg 33  search
BTDeep Sea Drilling Project
 .Leg 33
NTDSDP Site 314
 DSDP Site 315
 DSDP Site 316
 DSDP Site 317
 DSDP Site 318
RTNortheast Pacific
 Southeast Pacific
 East Pacific
 Equatorial Pacific
SNCentral equatorial Pacific Ocean. Sites 314-318. Added to Thesaurus in 1981.
Leg 34  search
BTDeep Sea Drilling Project
 .Leg 34
NTDSDP Site 319
 DSDP Site 320
 DSDP Site 321
RTSoutheast Pacific
SNSE Pacific Ocean. Sites 319-321. Added to Thesaurus in 1981.
Leg 35  search
BTDeep Sea Drilling Project
 .Leg 35
NTDSDP Site 322
 DSDP Site 323
 DSDP Site 324
 DSDP Site 325
RTAntarctic Ocean
SNAntarctic Ocean, S of the SE Pacific Ocean. Sites 322-325. Added to Thesaurus in 1981.
Leg 36  search
BTDeep Sea Drilling Project
 .Leg 36
NTDSDP Site 326
 DSDP Site 327
 DSDP Site 328
 DSDP Site 329
 DSDP Site 330
 DSDP Site 331
RTSouth Atlantic
 Antarctic Ocean
 Drake Passage
 Scotia Sea
 Falkland Plateau
SNDrake Passage, Scotia Sea, and SW Atlantic Ocean. Sites 326-331. Added to Thesaurus in 1981.
Leg 37  search
BTDeep Sea Drilling Project
 .Leg 37
NTDSDP Site 332
 DSDP Site 333
 DSDP Site 334
 DSDP Site 335
RTNorth Atlantic
 Mid-Atlantic Ridge
SNIn vicinity of the Mid-Atlantic Ridge, W of the Azores, N Atlantic Ocean. Sites 332-335. Added to Thesaurus in 1981.
Leg 38  search
BTDeep Sea Drilling Project
 .Leg 38
NTDSDP Site 336
 DSDP Site 337
 DSDP Site 338
 DSDP Site 339
 DSDP Site 340
 DSDP Site 341
 DSDP Site 342
 DSDP Site 343
 DSDP Site 344
 DSDP Site 345
 DSDP Site 346
 DSDP Site 347
 DSDP Site 348
 DSDP Site 349
 DSDP Site 350
 DSDP Site 352
RTNorth Atlantic
 Iceland-Faeroe Ridge
 Norwegian Sea
 Voring Plateau
 Jan Mayen Ridge
SNNorwegian Sea. Sites 336-352. Added to Thesaurus in 1981.
Leg 39  search
BTDeep Sea Drilling Project
 .Leg 39
NTDSDP Site 353
 DSDP Site 354
 DSDP Site 355
 DSDP Site 356
 DSDP Site 357
 DSDP Site 358
 DSDP Site 359
RTNorth Atlantic
 South Atlantic
 Atlantic Ocean
 Brazil Basin
 Argentine Basin
 Mid-Atlantic Ridge
 Equatorial Atlantic
 Rio Grande Rise
 Vema fracture zone
 Leg 154
 Walvis Ridge
SNW and SE Atlantic Ocean. Sites 353-359. Added to Thesaurus in 1981.
Leg 4  search
BTDeep Sea Drilling Project
 .Leg 4
NTDSDP Site 23
 DSDP Site 24
 DSDP Site 25
 DSDP Site 26
 DSDP Site 27
 DSDP Site 28
 DSDP Site 29
 DSDP Site 30
 DSDP Site 31
RTNorth Atlantic
 South Atlantic
 Atlantic Ocean
 Caribbean Sea
SNW Atlantic Ocean, NE of Brazil to the Puerto Rico Trench area and the Caribbean Sea. Sites 23-31. Added to Thesaurus in 1981.
Leg 40  search
BTDeep Sea Drilling Project
 .Leg 40
NTDSDP Site 360
 DSDP Site 361
 DSDP Site 362
 DSDP Site 363
 DSDP Site 364
 DSDP Site 365
RTAngola Basin
 South Atlantic
 Cape Basin
 Walvis Ridge
 Leg 175
SNSE Atlantic Ocean. Sites 360-365. Added to Thesaurus in 1981.
Leg 41  search
BTDeep Sea Drilling Project
 .Leg 41
NTDSDP Site 366
 DSDP Site 367
 DSDP Site 368
 DSDP Site 369
 DSDP Site 370
RTNorth Atlantic
 Cape Verde Basin
 Cape Verde Rise
 Sierra Leone Rise
SNNE Atlantic, off the coast of West Africa. Sites 366-370. Added to Thesaurus in 1981.
Leg 42A  search
BTDeep Sea Drilling Project
 .Leg 42A
NTDSDP Site 371
 DSDP Site 372
 DSDP Site 373
 DSDP Site 374
 DSDP Site 375
 DSDP Site 376
 DSDP Site 377
 DSDP Site 378
RTEast Mediterranean
 West Mediterranean
 Balearic Basin
 Mediterranean Sea
 Bannock Basin
 Ionian Sea
 Florence Rise
 Mediterranean Ridge
SNMediterranean Sea. Sites 371-378. Added to Thesaurus in 1981.
Leg 42B  search
BTDeep Sea Drilling Project
 .Leg 42B
NTDSDP Site 379
 DSDP Site 380
 DSDP Site 381
RTBlack Sea
SNBlack Sea. Sites 379-381. Added to Thesaurus in 1981.
Leg 43  search
BTDeep Sea Drilling Project
 .Leg 43
NTDSDP Site 382
 DSDP Site 383
 DSDP Site 384
 DSDP Site 385
 DSDP Site 386
 DSDP Site 387
RTNorth Atlantic
 Bermuda Rise
 New England Seamounts
SNNW Atlantic. Sites 382-387. Added to Thesaurus in 1981.
Leg 44  search
BTDeep Sea Drilling Project
 .Leg 44
NTDSDP Site 388
 DSDP Site 389
 DSDP Site 390
 DSDP Site 391
 DSDP Site 392
RTNorth Atlantic
 Blake Nose
 Leg 171B
 Blake-Bahama Basin
 Blake-Bahama Outer Ridge
SNCentral NW Atlantic Ocean. Sites 388-392. Added to Thesaurus in 1981.
Leg 45  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 45
NTDSDP Site 395
 DSDP Site 396
RTNorth Atlantic
 Mid-Atlantic Ridge
SNFirst cruise of the International Phase of Ocean Drilling (IPOD) of the Deep Sea Drilling Project. N central Atlantic Ocean. Sites 395-396.
Leg 46  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 46
NTDSDP Site 396
RTNorth Atlantic
 Mid-Atlantic Ridge
SNN central Atlantic Ocean. Site 396B, near the Mid-Atlantic Ridge axis.
Leg 47  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 47
NTDSDP Site 397
 DSDP Site 398
RTNorth Atlantic
 Leg 157
 Cape Bojador
 Iberian abyssal plain
 Leg 173
SNNE Atlantic Ocean. Sites 397-398, off NW Africa near the Canary Islands and off SW Europe near Portugal. Added to Thesaurus in 1981.
Leg 48  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 48
NTDSDP Site 399
 DSDP Site 400
 DSDP Site 401
 DSDP Site 402
 DSDP Site 403
 DSDP Site 404
 DSDP Site 405
 DSDP Site 406
RTNorth Atlantic
 Bay of Biscay
 Rockall Plateau
SNBay of Biscay and Rockall Plateau, NE Atlantic Ocean. Sites 399-406.
Leg 49  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 49
NTDSDP Site 407
 DSDP Site 408
 DSDP Site 409
 DSDP Site 410
 DSDP Site 411
 DSDP Site 412
 DSDP Site 413
RTNorth Atlantic
 Mid-Atlantic Ridge
 Reykjanes Ridge
SNN Atlantic Ocean near Iceland and along the Mid-Atlantic Ridge. Sites 407-414. Added to Thesaurus in 1981.
Leg 5  search
BTDeep Sea Drilling Project
 .Leg 5
NTDSDP Site 32
 DSDP Site 33
 DSDP Site 34
 DSDP Site 35
 DSDP Site 36
 DSDP Site 37
 DSDP Site 38
 DSDP Site 39
 DSDP Site 40
 DSDP Site 41
 DSDP Site 42
 DSDP Site 43
RTNortheast Pacific
SNNE Pacific Ocean. Sites 32-43, off California and across the Mendocino, Murray, and Clarion fracture zones at approximately W140#DG. Added to Thesaurus in 1981.
Leg 50  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 50
NTDSDP Site 415
 DSDP Site 416
RTNorth Atlantic
SNNE Atlantic Ocean, off Morocco. Sites 415-416. Added to Thesaurus in 1981.
Leg 51  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 51
NTDSDP Site 417
RTBermuda Rise
SNNW Atlantic Ocean, E of Florida, N of Puerto Rico. Site 417. Added to Thesaurus in 1981.
Leg 52  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 52
NTDSDP Site 417
 DSDP Site 418
RTBermuda Rise
SNNW Atlantic Ocean, E of Florida, N of Puerto Rico. Sites 417-418. Added to Thesaurus in 1981.
Leg 53  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 53
NTDSDP Site 418
RTBermuda Rise
SNNW Atlantic Ocean. Site 418. Added to Thesaurus in 1981.
Leg 54  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 54
NTDSDP Site 419
 DSDP Site 420
 DSDP Site 421
 DSDP Site 422
 DSDP Site 423
 DSDP Site 424
 DSDP Site 425
 DSDP Site 427
 DSDP Site 428
 DSDP Site 429
RTNortheast Pacific
 Equatorial Pacific
 Galapagos Rift
 East Pacific Rise
 Leg 70
SNE Equatorial Pacific. Sites 419-429, on the East Pacific Rise and Galapagos Rift. Added to Thesaurus in 1981.
Leg 55  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 55
NTDSDP Site 430
 DSDP Site 431
 DSDP Site 432
 DSDP Site 433
RTNorthwest Pacific
 Emperor Seamounts
SNNW Pacific Ocean. Sites 430-433, in the Emperor Seamounts. Added to Thesaurus in 1981.
Leg 56  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 56
NTDSDP Site 434
 DSDP Site 435
 DSDP Site 436
RTNorthwest Pacific
 Japan Trench
SNNW Pacific Ocean. Sites 434-437, near the Japan Trench. Added to Thesaurus in 1981.
Leg 57  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 57
NTDSDP Site 438
 DSDP Site 439
 DSDP Site 440
RTNorthwest Pacific
SNNW Pacific Ocean. Sites 438-441, near the Japan Trench. Added to Thesaurus in 1981.
Leg 58  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 58
NTDSDP Site 442
 DSDP Site 443
 DSDP Site 444
 DSDP Site 445
 DSDP Site 446
RTPhilippine Sea
SNN Philippine Sea. Sites 442-446. Added to Thesaurus in 1981.
Leg 59  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 59
NTDSDP Site 447
 DSDP Site 448
 DSDP Site 449
 DSDP Site 450
 DSDP Site 451
RTPhilippine Sea
 West Philippine Basin
 Kyushu-Palau Ridge
 Parece Vela Basin
SNPhilippine Sea. Sites 447-451. Added to Thesaurus in 1981.
Leg 6  search
BTDeep Sea Drilling Project
 .Leg 6
NTDSDP Site 44
 DSDP Site 45
 DSDP Site 46
 DSDP Site 47
 DSDP Site 48
 DSDP Site 49
 DSDP Site 50
 DSDP Site 51
 DSDP Site 52
 DSDP Site 53
 DSDP Site 54
 DSDP Site 55
 DSDP Site 56
 DSDP Site 57
 DSDP Site 58
 DSDP Site 59
 DSDP Site 60
RTNorthwest Pacific
 Philippine Sea
 Parece Vela Basin
SNNW Pacific Ocean and Philippine Sea. Sites 44-60 from N of the Mid-Pacific Mountains to the Shatsky Rise, the E Philippine Sea, and the Mariana Trench. Added to Thesaurus in 1981.
Leg 60  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 60
NTDSDP Site 452
 DSDP Site 453
 DSDP Site 454
 DSDP Site 455
 DSDP Site 456
 DSDP Site 457
 DSDP Site 458
 DSDP Site 459
 DSDP Site 460
 DSDP Site 461
RTPhilippine Sea
 Mariana Trough
 Mariana Trench
 East Mariana Basin
 ODP Site 777
SNSE Philippine Sea. Sites 452-461 from the Mariana Trough to E of the Mariana Trench. Added to Thesaurus in 1981.
Leg 61  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 61
NTDSDP Site 462
RTNorthwest Pacific
 Equatorial Pacific
 Nauru Basin
SNW central Pacific Ocean. Site 462 in the Nauru Basin. Added to Thesaurus in 1981.
Leg 62  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 62
NTDSDP Site 463
 DSDP Site 464
 DSDP Site 465
 DSDP Site 466
RTNorthwest Pacific
 Hess Rise
 Mid-Pacific Mountains
SNN central Pacific Ocean. Sites 463-466 in the Mid-Pacific Mountains and on Hess Rise. Added to Thesaurus in 1981.
Leg 63  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 63
NTDSDP Site 467
 DSDP Site 468
 DSDP Site 469
 DSDP Site 470
 DSDP Site 471
 DSDP Site 472
 DSDP Site 473
RTNortheast Pacific
SNNE Pacific Ocean. Sites 467-473 off S California and Baja California. Added to Thesaurus in 1981.
Leg 64  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 64
NTDSDP Site 474
 DSDP Site 475
 DSDP Site 476
 DSDP Site 477
 DSDP Site 478
 DSDP Site 479
 DSDP Site 480
 DSDP Site 481
RTNortheast Pacific
 Gulf of California
SNGulf of California. Sites 474-481. Added to Thesaurus in 1981.
Leg 65  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 65
NTDSDP Site 482
 DSDP Site 483
 DSDP Site 484
 DSDP Site 485
RTNortheast Pacific
 Gulf of California
SNAt mouth of the Gulf of California. Sites 482-485. Added to Thesaurus in 1981.
Leg 66  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 66
RTNortheast Pacific
SNNE Pacific Ocean off S Mexico. Sites 486-493. Added to Thesaurus in 1981.
Leg 67  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 67
NTDSDP Site 494
 DSDP Site 495
 DSDP Site 496
 DSDP Site 497
 DSDP Site 498
 DSDP Site 499
 DSDP Site 500
RTNortheast Pacific
 Equatorial Pacific
 Nicoya Complex
SNE Equatorial Pacific, off Central America. Sites 494-500. Added to Thesaurus in 1985.
Leg 68  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 68
NTDSDP Site 501
 DSDP Site 502
 DSDP Site 503
RTNortheast Pacific
 Equatorial Pacific
SNE Equatorial Pacific. Sites 501-503. Added to Thesaurus in 1985.
Leg 69  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 69
NTDSDP Site 504
 DSDP Site 505
RTNortheast Pacific
 Equatorial Pacific
SNE Equatorial Pacific, off Ecuador and Colombia. Sites 504-505. Added to Thesaurus in 1985.
Leg 7  search
BTDeep Sea Drilling Project
 .Leg 7
NTDSDP Site 61
 DSDP Site 62
 DSDP Site 63
 DSDP Site 64
 DSDP Site 65
 DSDP Site 66
 DSDP Site 67
RTSouth Pacific
 Southwest Pacific
 Southeast Pacific
 Equatorial Pacific
SNW Equatorial and N central Pacific Ocean. Sites 61-67. Added to Thesaurus in 1981.
Leg 70  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 70
NTDSDP Site 504
 DSDP Site 506
 DSDP Site 507
 DSDP Site 508
 DSDP Site 509
 DSDP Site 510
RTNortheast Pacific
 Equatorial Pacific
 Leg 54
SNE Equatorial Pacific, off Ecuador. Sites 506-510. Added to Thesaurus in 1985.
Leg 71  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 71
NTDSDP Site 511
 DSDP Site 512
 DSDP Site 513
 DSDP Site 514
RTSouth Atlantic
SNS Atlantic Ocean. Sites 511-514. Added to Thesaurus in 1985.
Leg 72  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 72
NTDSDP Site 515
 DSDP Site 516
 DSDP Site 517
 DSDP Site 518
RTSouth Atlantic
 Brazil Basin
 Vema Channel
 Rio Grande Rise
SNS Atlantic Ocean, off Brazil. Sites 515-518. Added to Thesaurus in 1985.
Leg 73  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 73
NTDSDP Site 519
 DSDP Site 520
 DSDP Site 521
 DSDP Site 522
 DSDP Site 523
 DSDP Site 524
RTAngola Basin
 South Atlantic
 Mid-Atlantic Ridge
SNE flank of Mid-Atlantic Ridge, S Atlantic Ocean. Sites 519-524. Added to Thesaurus in 1985.
Leg 74  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 74
NTDSDP Site 525
 DSDP Site 526
 DSDP Site 527
 DSDP Site 528
 DSDP Site 529
RTSouth Atlantic
 Walvis Ridge
SNSE Atlantic Ocean. Sites 525-529. Added to Thesaurus in 1985.
Leg 75  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 75
NTDSDP Site 530
 DSDP Site 531
 DSDP Site 532
RTSouth Atlantic
 Walvis Ridge
 Leg 175
SNSE Atlantic Ocean, off Namibia. Sites 530-532. Added to Thesaurus in 1985.
Leg 76  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 76
NTDSDP Site 533
 DSDP Site 534
RTNorth Atlantic
 Leg 172
SNNW Atlantic, off Florida. Sites 533-534. Added to Thesaurus in 1985.
Leg 77  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 77
NTDSDP Site 535
 DSDP Site 536
 DSDP Site 537
 DSDP Site 538
 DSDP Site 540
RTGulf of Mexico
 Caribbean Sea
SNE Gulf of Mexico. Sites 535-540. Added to Thesaurus in 1985.
Leg 78A  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 78A
NTDSDP Site 541
 DSDP Site 542
 DSDP Site 543
RTNorth Atlantic
 Caribbean Sea
 Leg 171A
 Barbados Ridge
 Leg 110
 Leg 156
SNIn Atlantic Ocean, E of the Caribbean Sea, including sites in Barbados Ridge. Sites 541-543. Added to Thesaurus in 1989.
Leg 78B  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 78B
NTDSDP Site 395
RTNorth Atlantic
 Mid-Atlantic Ridge
 Kane fracture zone
SNNear axis of Mid-Atlantic Ridge, just S of Kane fracture zone in N central Atlantic. Site 395A, which was previously drilled during Leg 45. Added to Thesaurus in 1989.
Leg 79  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 79
NTDSDP Site 544
 DSDP Site 545
 DSDP Site 546
 DSDP Site 547
RTMazagan Plateau
SNMazagan Plateau, off NW coast of Morocco. Sites 544-547. Added to Thesaurus in 1989.
Leg 8  search
BTDeep Sea Drilling Project
 .Leg 8
NTDSDP Site 68
 DSDP Site 69
 DSDP Site 70
 DSDP Site 71
 DSDP Site 72
 DSDP Site 73
 DSDP Site 74
 DSDP Site 75
RTNortheast Pacific
 Southeast Pacific
 East Pacific
 Equatorial Pacific
 Clipperton fracture zone
SNE Equatorial Pacific Ocean. Sites 68-75. Added to Thesaurus in 1981.
Leg 80  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 80
NTDSDP Site 548
 DSDP Site 549
 DSDP Site 550
 DSDP Site 551
RTNorth Atlantic
 Goban Spur
SNGoban Spur, N Biscay region in NE Atlantic. Sites 548-551. Added to Thesaurus in 1989.
Leg 81  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 81
NTDSDP Site 552
 DSDP Site 553
 DSDP Site 554
 DSDP Site 555
RTRockall Plateau
SNRockall Plateau, NE Atlantic. Sites 552-555. Added to Thesaurus in 1989.
Leg 82  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 82
NTDSDP Site 556
 DSDP Site 558
 DSDP Site 561
 DSDP Site 562
 DSDP Site 563
 DSDP Site 564
RTNorth Atlantic
 Mid-Atlantic Ridge
 Azores
 Oceanographer fracture zone
SNMid-Atlantic Ridge near the Azores. Sites 556-564. Added to Thesaurus in 1989.
Leg 83  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 83
NTDSDP Site 504
RTNortheast Pacific
 Equatorial Pacific
 Galapagos Rift
SNLocated about 201 km S of Costa Rica Rift in E Equatorial Pacific. Site 504B. Added to Thesaurus in 1989.
Leg 84  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 84
NTDSDP Site 565
 DSDP Site 566
 DSDP Site 567
 DSDP Site 568
 DSDP Site 570
RTEquatorial Pacific
 Middle America Trench
 Leg 170
SNMiddle America Trench off coast of Guatemala. Sites 565-570. Added to Thesaurus in 1989.
Leg 85  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 85
NTDSDP Site 571
 DSDP Site 572
 DSDP Site 573
 DSDP Site 574
 DSDP Site 575
RTNortheast Pacific
 Equatorial Pacific
SNE Equatorial Pacific. Sites 571-575. Added to Thesaurus in 1989.
Leg 86  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 86
NTDSDP Site 576
 DSDP Site 577
 DSDP Site 578
 DSDP Site 579
 DSDP Site 580
 DSDP Site 581
RTNorthwest Pacific
 Kuroshio
SNNW Pacific. Sites 576-581. Added to Thesaurus in 1989.
Leg 87  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 87
NTDSDP Site 582
 DSDP Site 583
 DSDP Site 584
RTNorthwest Pacific
 Nankai Trough
 Japan Trench
SNNankai Trough and Japan Trench. Sites 582-584. Added to Thesaurus in 1989.
Leg 88  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 88
NTDSDP Site 581
RTNorthwest Pacific
 Pacific Basin
SNNW Pacific Basin, S of Hokkaido fracture zone. Site 581. Added to Thesaurus in 1989.
Leg 89  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 89
NTDSDP Site 462
 DSDP Site 585
 DSDP Site 586
RTSouthwest Pacific
 Equatorial Pacific
 Ontong Java Plateau
 Mariana Trough
 Nauru Basin
 East Mariana Basin
SNEast Mariana Basin, Ontong Java Plateau and Nauru Basin, Equatorial Pacific. Sites 585, 586 and 462A. Added to Thesaurus in 1989.
Leg 9  search
BTDeep Sea Drilling Project
 .Leg 9
NTDSDP Site 76
 DSDP Site 77
 DSDP Site 78
 DSDP Site 79
 DSDP Site 80
 DSDP Site 81
 DSDP Site 82
 DSDP Site 83
 DSDP Site 84
RTNortheast Pacific
 Southeast Pacific
 East Pacific
 Equatorial Pacific
 Leg 148
SNE Equatorial Pacific Ocean. Sites 76-84. Added to Thesaurus in 1981.
Leg 90  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 90
NTDSDP Site 587
 DSDP Site 588
 DSDP Site 589
 DSDP Site 590
 DSDP Site 591
 DSDP Site 592
 DSDP Site 593
 DSDP Site 594
RTSouthwest Pacific
 Challenger Plateau
 Lord Howe Rise
 DSDP Site 284
SNSW Pacific, off E coast of Australia and NW of New Zealand. Sites 587-594B. Added to Thesaurus in 1989.
Leg 91  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 91
NTDSDP Site 595
 DSDP Site 596
RTSoutheast Pacific
 Tonga Trench
SNE of Tonga Trench in SE Pacific. Sites 595-596B. Added to Thesaurus in 1989.
Leg 92  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 92
NTDSDP Site 504
 DSDP Site 597
 DSDP Site 598
 DSDP Site 599
 DSDP Site 600
 DSDP Site 601
 DSDP Site 602
RTSoutheast Pacific
 East Pacific Rise
 Tahiti
SNEast Pacific Rise. Sites 597-602B. Also includes Site 504B near coast of Colombia. Added to Thesaurus in 1989.
Leg 93  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 93
NTDSDP Site 603
 DSDP Site 604
 DSDP Site 605
RTNorth Atlantic
 Blake-Bahama Formation
 Hatteras Formation
 Hudson Canyon
SNContinental rise off E coast of United States. Sites 603-605. Added to Thesaurus in 1989.
Leg 94  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 94
NTDSDP Site 606
 DSDP Site 607
 DSDP Site 608
 DSDP Site 609
 DSDP Site 610
 DSDP Site 611
RTNorth Atlantic
 Mid-Atlantic Ridge
SNMid-Atlantic Ridge, Feni Drift and Gardar Drift, NE Atlantic. Sites 606-611. Added to Thesaurus in 1989.
Leg 95  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 95
NTDSDP Site 603
 DSDP Site 612
 DSDP Site 613
RTNorth Atlantic
 Baltimore Canyon
SNPart of the New Jersey Transect in Baltimore Canyon, NW Atlantic. Sites 612-613. Added to Thesaurus in 1989.
Leg 96  search
BTDeep Sea Drilling Project
 .IPOD
 ..Leg 96
NTDSDP Site 614
 DSDP Site 615
 DSDP Site 616
 DSDP Site 617
 DSDP Site 618
 DSDP Site 619
 DSDP Site 620
 DSDP Site 621
 DSDP Site 622
 DSDP Site 623
 DSDP Site 624
RTGulf of Mexico
 Mississippi Fan
 Pigmy Basin
SNMostly in the Mississippi Fan, a region in the Gulf of Mexico which extends from the Mississippi Delta to the Sigsbee Deep and Florida abyssal plain. Sites 614-624A. Added to Thesaurus in 1989.
legal  search
SNSee legislation or practice or forensic geology if applicable.
legends  search
RTcartography
 maps
SNBefore 1981, search legend. Added to Thesaurus in 1981.
Leghorn Italy  search
USELivorno Italy
legislation  search
RTantitrust legislation
 Clean Air Act
 Clean Water Act
 decision-making
 economic geology
 engineering geology
 environmental geology
 forensic geology
 Indian reservations
 investment legislation
 land management
 land use
 Law of the Sea
 mining legislation
 national
SNThe making or giving of laws, or the enactments of a legislative body, or a matter of business for or under consideration by a legislative body. Not to be used for regulations. (Note added 1998.)
legrandite  search
BTarsenates
 .legrandite
Leguminosae  search
BTPlantae
 .Spermatophyta
 ..Angiospermae
 ...Dicotyledoneae
 ....Leguminosae
SNFamily.
Lehigh County Pennsylvania  search
BTUnited States
 .Pennsylvania
 ..Lehigh County Pennsylvania
SNE Pennsylvania.
lehm  search
USEloess
Leicestershire England  search
BTEurope
 .Western Europe
 ..United Kingdom
 ...Great Britain
 ....England
 .....Leicestershire England
RTBarwell Meteorite
 Midlands
 East Midlands
SNCentral England. After 1974, includes former counties of Leicester and Rutland.
leifite  search
BThalides
 .fluorides
 ..leifite
BTsilicates
 .framework silicates
 ..leifite
RTaluminosilicates
SNThis term has multiple hierarchies.
Leine Valley  search
BTEurope
 .Central Europe
 ..Germany
 ...Lower Saxony Germany
 ....Leine Valley
SNRiver valley in SE and central Lower Saxony. Also search Leine.
Leinster  search
BTEurope
 .Western Europe
 ..Ireland
 ...Leinster
SNTraditional province in E comprising 12 counties.
Leinster Granite  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Leinster Granite
RTIreland
SNMiddle Paleozoic. SE Ireland. Indexed with ages as applicable. Added to Thesaurus in 1993.
Leipzig Bezirk  search
SNNo longer a valid term for GeoRef. District in S central East Germany. Before 1981, search Leipzig Germany.
Leipzig Germany  search
BTEurope
 .Central Europe
 ..Germany
 ...Saxony Germany
 ....Leipzig Germany
SNIn Saxony, E Germany. As of 1981, Leipzig refers to only the city in S central E Germany. Before 1981, it also included the East German district.
Leiria Portugal  search
BTEurope
 .Southern Europe
 ..Iberian Peninsula
 ...Portugal
 ....Leiria Portugal
RTEstremadura Portugal
SNDistrict and city in W Portugal.
Leman Lake  search
USELake Geneva
Leman Sandstone Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Permian
 ....Lower Permian
 .....Leman Sandstone Formation
RTRotliegendes
 North Sea
SNRotliegendes. North Sea. Added to Thesaurus in 1995.
Lemhi County Idaho  search
BTUnited States
 .Idaho
 ..Lemhi County Idaho
NTBlackbird mining district
 Salmon Idaho
RTLemhi Range
SNE Idaho.
Lemhi Range  search
BTUnited States
 .Idaho
 ..Lemhi Range
RTLemhi County Idaho
 Butte County Idaho
SNE central Idaho. Primarily in Lemhi and Butte counties.
Lena Basin  search
BTCommonwealth of Independent States
 .Russian Federation
 ..Lena Basin
BTAsia
 .Lena Basin
UFLena region
 Lena River basin
RTYakutia Russian Federation
 Angara-Lena Basin
 Irkutsk Russian Federation
SNRiver basin. E central and N Siberia including areas in Irkutsk Oblast, and Yakutia. Also search Lena. This term has multiple hierarchies.
Lena region  search
USELena Basin
Lena River  search
BTCommonwealth of Independent States
 .Russian Federation
 ..Lena River
BTAsia
 .Lena River
SNRises in the Baikal Mountains W of Lake Baikal in Irkutsk Oblast and flows NE into a great bend in Yakutia, and then NW through a large delta into the Laptev Sea. Also search Lena. This term has multiple hierarchies.
Lena River basin  search
USELena Basin
Lenawee County Michigan  search
BTUnited States
 .Michigan
 ..Michigan Lower Peninsula
 ...Lenawee County Michigan
length of day  search
RTclimate
 paleoclimatology
 rotation
SNAdded to Thesaurus in 1981.
Leninabad Tajikistan  search
BTAsia
 .Tajikistan
 ..Leninabad Tajikistan
NTKaramazar Tajikistan
 Tary-Ekam Tajikistan
RTShugnan Tajikistan
 Karamazar
SNOblast and city in NW Tajikistan. This term has multiple hierarchies.
Leningrad City Russian Federation  search
USESaint Petersburg Russian Federation
Leningrad Mining Institute  search
RTacademic institutions
 Russian Federation
SNIn former Leningrad, now Saint Petersburg.
Leningrad Oblast Russian Federation  search
BTCommonwealth of Independent States
 .Russian Federation
 ..Leningrad Oblast Russian Federation
BTEurope
 .Leningrad Oblast Russian Federation
NTSaint Petersburg Russian Federation
RTBaltic region
SNOblast, Gulf of Finland. Surrounds Saint Petersburg city which is also an oblast. Before 1993, Leningrad Oblast Russian Republic was also used. This term has multiple hierarchies.
Leninogorsk Kazakhstan  search
BTCommonwealth of Independent States
 .Kazakhstan
 ..Leninogorsk Kazakhstan
UFRidder Kazakhstan
SNCity in Vostochno (East) Kazakhstan Oblast in extreme E Kazakhstan. This term has multiple hierarchies.
Lenkoran Azerbaijan  search
BTEurope
 .Azerbaijan
 ..Lenkoran Azerbaijan
SNCity on Caspian Sea near Iranian border. This term has multiple hierarchies.
Lennox and Addington County Ontario  search
BTCanada
 .Eastern Canada
 ..Ontario
 ...Lennox and Addington County Ontario
Lenoir County North Carolina  search
BTUnited States
 .North Carolina
 ..Lenoir County North Carolina
Lenoir Limestone  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Ordovician
 ....Middle Ordovician
 .....Lenoir Limestone
RTVirginia
 Alabama
 Tennessee
 Stones River Group
SNIn Stones River Group. E Tennessee, N Alabama and W Virginia. Added to Thesaurus in 1985.
lenses  search
RTice lenses
 mineral deposits, genesis
 sedimentary rocks
SNAny lense-shaped deposit.
Lenticulina  search
BTInvertebrata
 .Protista
 ..Foraminifera
 ...Rotaliina
 ....Nodosariacea
 .....Nodosariidae
 ......Lenticulina
RTmicrofossils
SNGenus. Indexed with microfossils if applicable.
Leon  search
SNNo longer a valid term for GeoRef. As of 1993, see Leon City Spain for the city. For the department in Nicaragua, see Leon Nicaragua. For the city in Mexico, see Leon Mexico.
Leon City  search
SNNo longer a valid term for GeoRef. See Leon Mexico. For the city in Spain, see Leon City Spain.
Leon City Spain  search
BTEurope
 .Southern Europe
 ..Iberian Peninsula
 ...Spain
 ....Castilla y Leon Spain
 .....Leon Spain
 ......Leon City Spain
RTMexico
 Nicaragua
SNRefers to only the city in Spain. Before 1993, also search Leon Spain.
Leon County Florida  search
BTUnited States
 .Florida
 ..Leon County Florida
SNBounded by Ochlockonee River and Lake Talquin in NW Florida.
Leon County Texas  search
BTUnited States
 .Texas
 ..Leon County Texas
RTOakwood Dome
SNE central Texas.
Leon Mexico  search
BTMexico
 .Guanajuato Mexico
 ..Leon Mexico
SNCity in Guanajuato, Mexico.
Leon Nicaragua  search
BTCentral America
 .Nicaragua
 ..Leon Nicaragua
SNDepartment including the city in W Nicaragua. From 1981-1992, also search Leon Department and Nicaragua.
Leon region  search
SNNo longer a valid term for GeoRef. Former region in NW Spain which included the provinces, Leon Spain, Salamanca Spain, and Zamora Spain. Before 1981, also search Leon Spain.
Leon Spain  search
BTEurope
 .Southern Europe
 ..Iberian Peninsula
 ...Spain
 ....Castilla y Leon Spain
 .....Leon Spain
NTLeon City Spain
SNRefers only to the province in NW Spain. From 1981-1992, also search Leon Province and Spain. For the city, see Leon City Spain.
Leonardian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Permian
 ....Lower Permian
 .....Leonardian
NTBone Spring Limestone
 Clear Fork Group
RTAbo Formation
 San Andres Formation
SNProvincial series, North America. Above Wolfcampian, below Guadalupian.
leonardite  search
USEleonhardite
leonhardite  search
BTsilicates
 .framework silicates
 ..zeolite group
 ...leonhardite
UFleonardite
RTlaumontite
leopoldite  search
USEsylvite
Leoville Meteorite  search
BTmeteorites
 .stony meteorites
 ..chondrites
 ...carbonaceous chondrites
 ....CV chondrites
 .....Leoville Meteorite
RTKansas
 Decatur County Kansas
SNImpact in Decatur County, NW Kansas. Added to Thesaurus in 1989.
Leoville Saskatchewan  search
BTCanada
 .Western Canada
 ..Saskatchewan
 ...Leoville Saskatchewan
SNVillage in W central Saskatchewan.
Leperditicopida  search
BTInvertebrata
 .Arthropoda
 ..Mandibulata
 ...Crustacea
 ....Ostracoda
 .....Leperditicopida
BTmicrofossils
 .Leperditicopida
SNOrder. This term has multiple hierarchies.
lepidocrocite  search
BToxides
 .lepidocrocite
RTiron hydroxides
 iron oxides
Lepidocyclina  search
BTInvertebrata
 .Protista
 ..Foraminifera
 ...Rotaliina
 ....Orbitoidacea
 .....Lepidocyclina
RTmicrofossils
SNIndexed with microfossils if applicable.
Lepidocystoidea  search
BTInvertebrata
 .Echinodermata
 ..Crinozoa
 ...Lepidocystoidea
Lepidodendron  search
BTPlantae
 .Pteridophyta
 ..Lycopsida
 ...Lepidodendron
SNGenus.
lepidolite  search
BTsilicates
 .sheet silicates
 ..mica group
 ...lepidolite
BThalides
 .fluorides
 ..lepidolite
RTcookeite
SNThis term has multiple hierarchies.
lepidomelane  search
BTsilicates
 .sheet silicates
 ..mica group
 ...lepidomelane
Lepidoptera  search
BTInvertebrata
 .Arthropoda
 ..Mandibulata
 ...Insecta
 ....Pterygota
 .....Neoptera
 ......Endopterygota
 .......Lepidoptera
UFLepidopteroida
RTRaphidiodea
SNOrder.
Lepidopteroida  search
USELepidoptera
Lepidosauria  search
BTChordata
 .Vertebrata
 ..Tetrapoda
 ...Reptilia
 ....Diapsida
 .....Lepidosauria
NTSquamata
RTEosuchia
 Rhynchosauria
SNIn Lepidosauromorpha. Before 1993, Eosuchia was a broader term and Rhynchosauria was a narrower term.
Lepontine Alps  search
BTEurope
 .Alps
 ..Central Alps
 ...Lepontine Alps
NTGotthard Massif
RTPiemonte Italy
 San Giorgio Mountain
 Graubunden Switzerland
 Piedmont Alps
 Ticino Switzerland
SNDivision of Central Alps. Indexed with countries as applicable.
Leporidae  search
BTChordata
 .Vertebrata
 ..Tetrapoda
 ...Mammalia
 ....Theria
 .....Eutheria
 ......Lagomorpha
 .......Leporidae
Lepospondyli  search
BTChordata
 .Vertebrata
 ..Tetrapoda
 ...Amphibia
 ....Lepospondyli
SNSubclass.
leptite  search
BTmetamorphic rocks
 .granulites
 ..leptite
UFleptynite
Leptocythere  search
BTInvertebrata
 .Arthropoda
 ..Mandibulata
 ...Crustacea
 ....Ostracoda
 .....Podocopida
 ......Cytherocopina
 .......Cytheracea
 ........Leptocythere
SNGenus. This term has multiple hierarchies.
leptynite  search
USEleptite
Lerida Spain  search
BTEurope
 .Southern Europe
 ..Iberian Peninsula
 ...Spain
 ....Catalonia Spain
 .....Lerida Spain
NTMontsech
 Pobla de Segur Spain
 Tremp Spain
RTLlobregat River basin
 Segre Valley
SNProvince in Catalonia in NE Spain.
Les Eyzies region  search
BTEurope
 .Western Europe
 ..France
 ...Dordogne France
 ....Les Eyzies region
UFLes Eyzies-de-Tayac
SNS Dordogne, France. Added to Thesaurus in 1985.
Les Eyzies-de-Tayac  search
USELes Eyzies region
Lesbos  search
BTMediterranean region
 .Aegean Islands
 ..Greek Aegean Islands
 ...Lesbos
SNIsland in E Aegean Sea off NW Anatolia. Also a Greek department. This term has multiple hierarchies.
Leslie County Kentucky  search
BTUnited States
 .Kentucky
 ..Leslie County Kentucky
RTLewis Creek
SNSE Kentucky.
Lesna Poland  search
BTEurope
 .Central Europe
 ..Poland
 ...Wroclaw Poland
 ....Lesna Poland
SNTown in Lower Silesia in SW Poland.
Lesotho  search
BTAfrica
 .Southern Africa
 ..Lesotho
UFBasutoland
RTOrange River
SNFormer British colony of Basutoland.
Lesser Antilles  search
BTCaribbean region
 .West Indies
 ..Antilles
 ...Lesser Antilles
NTBarbados
 Carriacou
 Dominica
 Grenada
 Guadeloupe
 Martinique
 Netherlands Antilles
 Saint Vincent
 Soufriere
 Trinidad and Tobago
 Virgin Islands
RTMontserrat
 Windward Islands
 Leeward Islands
 Saint John Island
 Saint Lucia
SNThe smaller islands of the Antilles extending in an arc from Puerto Rico to the islands N of Venezuela. Indexed with Barbados, Trinidad and/or Leeward Islands or Windward Islands or other island groups as applicable.
Lesser Caucasus  search
BTEurope
 .Caucasus
 ..Lesser Caucasus
NTShakhdag Range
 Trialet Range
 Zangezur
RTGeorgian Republic
 Armenia
 Azerbaijan
 Aragats
 Transcaucasia
 Nagorno-Karabakh Azerbaijan
SNMountain system formed by the N frontal ranges of the Armenian Highland and separated from the Greater Caucasus by the Colchis and Kura lowlands. Indexed with former Soviet republics as applicable.
Lesser Himalayas  search
BTmalayas
 .Lesser Himalayas
RTIndia
 Bhutan
 Nepal
 Sikkim India
SNThe central range of the Himalayas running parallel to the Greater Himalayas to the N. Indexed with countries as applicable.
Lesser Khingan Mountains  search
USEXiao Hinggan Ling
Lesser Sunda Islands  search
BTAsia
 .Far East
 ..Lesser Sunda Islands
NTBali
 Pantar
 Timor
RTIndonesia
 West Pacific Ocean Islands
 Sunda Arc
SNChain of islands E from Bali to and including Alor and Timor, but not Wetar. Indexed with Indonesia as applicable.
Lesser Walachia  search
USEOltenia
Lessini Mountains  search
BTEurope
 .Southern Europe
 ..Italy
 ...Lessini Mountains
BTEurope
 .Alps
 ..Eastern Alps
 ...Dolomites
 ....Lessini Mountains
UFMonti Lessini
RTVeneto Italy
SNIn SW Dolomites in NE Italy. This term has multiple hierarchies.
Letcher County Kentucky  search
BTUnited States
 .Kentucky
 ..Letcher County Kentucky
SNSE Kentucky.
letter  search
SNA valid term through mid-1978; used in title annotation when document is correspondence. No longer a valid index term.
leucite  search
BTsilicates
 .framework silicates
 ..leucite
UFVesuvian garnet
RTfelsic composition
leucitite  search
BTigneous rocks
 .plutonic rocks
 ..gabbros
 ...alkali gabbros
 ....leucitite
RTalkali basalts
 ultramafics
leucogranite  search
BTigneous rocks
 .plutonic rocks
 ..granites
 ...leucogranite
leucosomes  search
BTmetamorphic rocks
 .migmatites
 ..leucosomes
SNLight-colored part of a migmatite. Added to Thesaurus in 1989.
leucosphenite  search
BTsilicates
 .sheet silicates
 ..leucosphenite
leucoxene  search
BToxides
 .leucoxene
RTtitanium ores
Leuven Belgium  search
USELouvain Belgium
Levack Gneiss  search
BTChronostratigraphic Units
 .Precambrian
 ..Levack Gneiss
RTPaleoproterozoic
 Superior Province
 Ontario
 upper Archean
SNUpper Archean-?Paleoproterozoic. Superior Province, Sudbury District, near the Sudbury Structure, S Ontario. Indexed with age as applicable.
Levalloisian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Stone Age
 ....Paleolithic
 .....Levalloisian
RTPleistocene
 archaeology
 Quaternary
SNArchaeological classification. Europe, Middle East and the former USSR. Added to Thesaurus in 1985.
Levant  search
SNAs of 1981, no longer a valid term for GeoRef. Use Middle East.
Levantinian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Neogene
 ....Pliocene
 .....upper Pliocene
 ......Levantinian
SNAustria.
levees  search
RTchannels
 embankments
 floodplains
 fluvial features
 geomorphology
 marine geology
 overbank sediments
 retaining walls
 sand boils
 streams
 submarine canyons
 waterways
level, changes of  search
SNNot a valid term for GeoRef. Now see sea-level changes or lake-level changes. Also see transgression or regression.
leveling  search
UFlevelling
RTcartography
 geodesy
 trilateration
leveling networks  search
SNUse leveling and geodetic networks.
levelling  search
USEleveling
levels  search
RTbackground level
 background radiation
 drawdown
 ground water
 highstands
 lacustrine environment
 lake-level changes
 low water
 lowstands
 potentiometric surface
 regression
 reservoirs
 sea-level changes
 shallow aquifers
 shallow depth
 submergence
 transgression
 wa
SNFor cycles of sedimentation use sea-level changes or lake-level changes.
Levis County Quebec  search
BTCanada
 .Eastern Canada
 ..Quebec
 ...Levis County Quebec
Levis Shale  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Devonian
 ....Levis Shale
RTQuebec
Levy County Florida  search
BTUnited States
 .Florida
 ..Levy County Florida
SNBounded by Gulf of Mexico in N Florida.
LEW 86010  search
BTmeteorites
 .stony meteorites
 ..achondrites
 ...angrite
 ....LEW 86010
BTmeteorites
 .Lewis Cliff Meteorites
 ..LEW 86010
RTAntarctica
 Beardmore Glacier
SNAlso search LEW86010 OR LEW 86010 Meteorite. This term has multiple hierarchies. Added to Thesaurus in 1995.
LEW 88516  search
BTmeteorites
 .stony meteorites
 ..achondrites
 ...Martian meteorites
 ....SNC Meteorites
 .....shergottite
 ......LEW 88516
BTmeteorites
 .Lewis Cliff Meteorites
 ..LEW 88516
RTAntarctica
 Ross Dependency
 Ross Ice Shelf
 Beardmore Glacier
SNLherzolite. This term has multiple hierarchies.
Lewis and Clark County Montana  search
BTUnited States
 .Montana
 ..Lewis and Clark County Montana
NTHelena Montana
RTSawtooth Range
SNW central Montana.
Lewis and Clark Line  search
USELewis and Clark Lineament
Lewis and Clark Lineament  search
BTUnited States
 .Lewis and Clark Lineament
UFLewis and Clark Line
 Montana Lineament
RTIdaho
 Montana
SNN Idaho to central Montana. Indexed with states as applicable. Added to Thesaurus in 1989.
Lewis Cliff Meteorites  search
BTmeteorites
 .Lewis Cliff Meteorites
NTLEW 86010
 LEW 88516
UFLewis Cliffs Meteorites
RTAntarctica
 Ross Dependency
 Ross Ice Shelf
 Beardmore Glacier
SNMeteorites found in or near ice tongue at Lewis Cliff, Beardmore Glacier region near the edge of the Ross Ice Shelf, Ross Dependency. Due to abbreviations for these meteorites, such as LEW 86010 and LEW86010, also search LEW in combination with number. Ad
Lewis Cliffs Meteorites  search
USELewis Cliff Meteorites
Lewis County Idaho  search
BTUnited States
 .Idaho
 ..Lewis County Idaho
SNW Idaho.
Lewis County Kentucky  search
BTUnited States
 .Kentucky
 ..Lewis County Kentucky
SNNE Kentucky.
Lewis County Missouri  search
BTUnited States
 .Missouri
 ..Lewis County Missouri
SNNE Missouri.
Lewis County New York  search
BTUnited States
 .New York
 ..Lewis County New York
SNN central New York.
Lewis County Tennessee  search
BTUnited States
 .Tennessee
 ..Lewis County Tennessee
SNCentral Tennessee.
Lewis County Washington  search
BTUnited States
 .Washington
 ..Lewis County Washington
RTCowlitz River
 Yakima Indian Reservation
 Mount Rainier National Park
SNSW Washington.
Lewis County West Virginia  search
BTUnited States
 .West Virginia
 ..Lewis County West Virginia
SNCentral W Virginia.
Lewis Creek  search
RTColorado
 Illinois
 Kentucky
 Leslie County Kentucky
SNPaleobotanical locality in Leslie County, E Kentucky. There are also features with this name in Colorado and Illinois. Search in combination with appropriate state. Indexed with counties or states as applicable. Added to Thesaurus in 1989.
Lewis Shale  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Upper Cretaceous
 .....Lewis Shale
RTNew Mexico
 Wyoming
 Colorado
SNLewis and Meeteetse formations throughout N central Wyoming considered stratigraphic equivalents with Lewis being applied generally in areas where marine strata are present and Meeteetse in areas where rocks are nonmarine in character. W Colorado, NW New
Lewis thrust fault  search
RTAlberta
 Montana
 North America
SNNW Montana and SW Alberta. Indexed with Montana and/or Alberta or region as applicable. Added to Thesaurus in 1989.
Lewisian  search
BTChronostratigraphic Units
 .Precambrian
 ..Proterozoic
 ...Lewisian
UFHebridean
SNEurope.
Lewisian Complex  search
BTChronostratigraphic Units
 .Precambrian
 ..Lewisian Complex
RTArchean
 Proterozoic
 Scotland
SNNW Scotland. Includes Loch Maree Group. Indexed with ages as applicable. Added to Thesaurus in 1989.
lexicons  search
RTArabic
 bibliography
 catalogs
 dictionaries
 English
 French
 German
 glossaries
 mineralogy
 monographs
 paleontology
 petrology
 publications
 Russian
 sedimentary petrology
 stratigraphy
 structural geology
SNUsed for the systematic arrangement of words in one or more languages, and their definitions. Indexed with language if not English.
Lexington County South Carolina  search
BTUnited States
 .South Carolina
 ..Lexington County South Carolina
Lexington Limestone  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Ordovician
 ....Middle Ordovician
 .....Lexington Limestone
RTKentucky
SNComprises Curdsville Limestone, Logana Formation, Jessamine Limestone, Benson Limestone, Brannon Limestone with Woodburn Phosphatic Member. Central Kentucky.
Lg-waves  search
BTelastic waves
 .seismic waves
 ..surface waves
 ...Lg-waves
RTseismology
 waves
 continental crust
 Love waves
 Rayleigh waves
 short-period waves
SNHigher-mode short-period Love and Rayleigh waves which only travel through continental crust. Added to Thesaurus in 1989.
Lhasa Block  search
BTAsia
 .Far East
 ..China
 ...Xizang China
 ....Lhasa Block
RTINDEPTH
 Qinghai-Xizang Plateau
 Lhasa China
SNQinghai-Xizang Plateau, SW China. Added to Thesaurus in 1989.
Lhasa China  search
BTAsia
 .Far East
 ..China
 ...Xizang China
 ....Lhasa China
RTLhasa Block
SNCity in SE Xizang.
Lherz  search
BTEurope
 .Western Europe
 ..France
 ...Lherz
RTAriege France
SNLake in the Pyrenees in S France.
lherzolite  search
BTigneous rocks
 .plutonic rocks
 ..ultramafics
 ...peridotites
 ....lherzolite
RTgarnet lherzolite
 spinel lherzolite
Li  search
USElithium
Li-6  search
BTisotopes
 .stable isotopes
 ..Li-6
BTmetals
 .alkali metals
 ..lithium
 ...Li-6
SNThis term has multiple hierarchies.
Li-7  search
BTisotopes
 .stable isotopes
 ..Li-7
BTmetals
 .alkali metals
 ..lithium
 ...Li-7
SNThis term has multiple hierarchies.
Liaodong Peninsula  search
BTAsia
 .Far East
 ..China
 ...Liaoning China
 ....Liaodong Peninsula
UFLiaotung Peninsula
RTBohai Bay
SNS Liaoning, NE China. Extends into Bohai Bay. Added to Thesaurus in 1989.
Liaohe Basin  search
BTAsia
 .Far East
 ..China
 ...Liaohe Basin
SNNE China. Added to Thesaurus in 1989.
Liaoning China  search
BTAsia
 .Far East
 ..China
 ...Liaoning China
NTAnshan China
 Haicheng China
 Liaodong Peninsula
RTTancheng-Lujiang fault zone
 Anshan Group
 Bohai Bay
 Haicheng earthquake 1975
SNProvince in NE China.
Liaotung Peninsula  search
USELiaodong Peninsula
Liard River  search
BTCanada
 .Liard River
RTBritish Columbia
 Yukon Territory
 Northwest Territories
SNAfter 1993, use Liard River British Columbia for the town in N British Columbia. Indexed with British Columbia and/or territories as applicable.
Lias  search
USELower Jurassic
Liassic  search
USELower Jurassic
Liberia  search
BTAfrica
 .West Africa
 ..Liberia
NTBong Range
 Liberian Shield
RTSaint John River
 Nimba Mountains
Liberian Shield  search
BTAfrica
 .West Africa
 ..Liberia
 ...Liberian Shield
SNInland plateau.
Liberty County Florida  search
BTUnited States
 .Florida
 ..Liberty County Florida
SNBounded by Ochlockonee River and Apalachicola River in NW Florida.
Liberty County Georgia  search
BTUnited States
 .Georgia
 ..Liberty County Georgia
SNSE Georgia.
Liberty County Montana  search
BTUnited States
 .Montana
 ..Liberty County Montana
SNE Montana.
Liberty County Texas  search
BTUnited States
 .Texas
 ..Liberty County Texas
SNE Texas.
Libia  search
USELibya
libraries  search
RTbibliography
 catalogs
 collections
 education
 geology
SNAdded to Thesaurus in 1985.
Libya  search
BTAfrica
 .North Africa
 ..Libya
NTCyrenaica
 Fezzan
 Garian Libya
 Kufra Basin
 Murzuk Basin
 Sirte Basin
 Tibesti Libya
 Tripoli Libya
 Tripolitania
 Zelten Libya
UFLibia
RTSahara
 Mediterranean region
 Nubian Sandstone
 Ghadames Basin
 Maghreb
 Libyan Desert
 Tibesti Massif
 Near East
Libyan Desert  search
BTAfrica
 .Libyan Desert
RTEgypt
 impact features
 Bahariya Oasis
 Sudan
 Libya
 Western Desert
SNDesert area of the E Sahara, W of the Nile. Indexed with countries as applicable.
licensing  search
RTeconomic geology
 geologists
 geology
 mining geology
 practice
 registration
 resources
SNProcess of granting permission or authorization for some purpose. Indexed with practice and geologists as applicable.
lichenometry  search
RTgeochronology
 lichens
 relative age
lichens  search
RTalgae
 cyanobacteria
 fungi
 lichenometry
 Plantae
 thallophytes
Lichida  search
BTInvertebrata
 .Arthropoda
 ..Trilobitomorpha
 ...Trilobita
 ....Lichida
Licking County Ohio  search
BTUnited States
 .Ohio
 ..Licking County Ohio
lida  search
lidar methods  search
BTradar methods
 .lidar methods
BTlaser methods
 .lidar methods
UFlaser radar methods
 optical radar methods
RTremote sensing
 electromagnetic methods
 geophysical profiles
SNLIght Detection And Ranging. Remote sensing system which uses laser light pulses, which can be operated in a profiling or scanning mode. This term has multiple hierarchies. Added to Thesaurus in 1998.
Liechtenstein  search
BTEurope
 .Central Europe
 ..Liechtenstein
RTRhine River
 Rhine Basin
SNIndependent principality between NE Switzerland and W Austria.
Liege Belgium  search
BTEurope
 .Western Europe
 ..Belgium
 ...Liege Belgium
NTStavelot Belgium
 Vesdre Valley
RTHohe Venn
 Liege earthquake 1983
 Limburg Belgium
SNProvince and city in E Belgium.
Liege earthquake 1983  search
BTearthquakes
 .Liege earthquake 1983
RTBelgium
 Liege Belgium
SNEpicenter in Liege, E Belgium. Added to Thesaurus in 1989.
lifax County Nova Scotia  search
NTHalifax Nova Scotia
life  search
SNA valid index term through 1977 used in combination with origin.
life assemblage  search
USEbiocenoses
life o  search
life origin  search
RTbiologic evolution
 creationism
 Darwinism
 DNA
 exobiology
 extraterrestrial geology
 molecular biology
 paleontology
 RNA
ligands  search
RTbonding
 chelation
 complexing
 inorganic materials
 ions
 metals
 organic compounds
 organo-metallics
SNIn a chelate or coordination compound, the molecule, ion or group bound to the central atom. Added to Thesaurus in 1993.
light microscopy  search
SNAs of 1993, see optical spectra, optical spectroscopy or microscope methods.
light minerals  search
RTcalcite
 dolomite
 heavy minerals
 minerals
 muscovite
 opaque minerals
 quartz
light nonaqueous phase liquids  search
BTnonaqueous phase liquids
 .light nonaqueous phase liquids
UFLNAPLs
RTpollutants
 multiphase flow
 liquid phase
 density
 dense nonaqueous phase liquids
 oil spills
 leaking underground storage tanks
 gasoline
 petroleum products
SNBefore 1998, also search LNAPL.
lightning  search
RTfireballs
 fulgurite
 meteorology
lightweight aggregate  search
USEaggregate
lignin  search
BTorganic compounds
 .lignin
RTseeds
 cellulose
 wood
SNAdded to Thesaurus in 1993.
lignite  search
BTsedimentary rocks
 .coal
 ..lignite
RTorganic compounds
 Adamow Mine
 anthracite
 peat
 Belchatow Mine
 huminite
 humodetrinite
SNSee list C for use as a commodity term.
Liguria Italy  search
BTEurope
 .Southern Europe
 ..Italy
 ...Liguria Italy
NTGenoa Italy
 Ligurian Alps
 Ligurian Apennines
 Savona Italy
SNAutonomous region in NW Italy.
Ligurian Alps  search
BTEurope
 .Alps
 ..Western Alps
 ...Ligurian Alps
BTEurope
 .Southern Europe
 ..Italy
 ...Liguria Italy
 ....Ligurian Alps
RTMaritime Alps
 Voltri Group
SNE extension of Maritime Alps along coast of Ligurian Sea. This term has multiple hierarchies.
Ligurian Apennines  search
BTEurope
 .Southern Europe
 ..Italy
 ...Liguria Italy
 ....Ligurian Apennines
BTEurope
 .Southern Europe
 ..Italy
 ...Apennines
 ....Ligurian Apennines
NTMonte Antola
SNExtend from near Savona SE to just N of La Spezia along coast of Ligurian Sea. This term has multiple hierarchies.
Ligurian Sea  search
BTMediterranean Sea
 .West Mediterranean
 ..Ligurian Sea
SNEnclosed by Italian autonomous regions of Liguria and Tuscany on the N and E, and by Corsica on the S.
Likhvin Russian Federation  search
USEChekalin Russian Federation
likian  search
NTNeohelikian
Liliidae  search
BTPlantae
 .Spermatophyta
 ..Angiospermae
 ...Monocotyledoneae
 ....Liliidae
Lille France  search
BTEurope
 .Western Europe
 ..France
 ...Nord France
 ....Lille France
SNCity near Belgian frontier in N France.
lillianite  search
BTsulfosalts
 .sulfobismuthites
 ..lillianite
Lilydale Limestone  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Devonian
 ....Lilydale Limestone
RTAustralia
 Victoria Australia
SNUpper Yarra District in S central Victoria.
Lima Peru  search
BTSouth America
 .Peru
 ..Lima Peru
NTCasapalca Peru
 Santa Eulalia Peru
RTPucara Group
SNDepartment and city in W Peru.
Limagne  search
BTEurope
 .Western Europe
 ..France
 ...Limagne
RTAllier France
 Puy-de-Dome France
SNFertile lowland in central France. Indexed with departments as applicable.
Limbourg  search
SNSee Limburg for the region, Limburg Belgium, or Limburg Netherlands.
Limburg  search
BTEurope
 .Western Europe
 ..Limburg
RTLimburg Belgium
 Limburg Netherlands
 Roermond earthquake 1992
SNAs of 1993, use only for the region in W Europe which includes the town and province in Belgium and province in SE Netherlands. Also search Limbourg. Indexed with countries and provinces as applicable.
Limburg Belgium  search
BTEurope
 .Western Europe
 ..Belgium
 ...Limburg Belgium
RTLiege Belgium
 Limburg
 Limburg Netherlands
SNName of province in E Belgium. As of 1993, use Limbourg Belgium for town in Liege Belgium.
Limburg Netherlands  search
BTEurope
 .Western Europe
 ..Netherlands
 ...Limburg Netherlands
NTMaastricht Netherlands
RTLimburg Belgium
 Limburg
 Roermond earthquake 1992
SNProvince in SE Netherlands.
limburgite  search
BTigneous rocks
 .plutonic rocks
 ..ultramafics
 ...limburgite
lime  search
RTcalcium carbonate
 limestone deposits
SNUsed as a commodity term.
Lime Creek Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Devonian
 ....Upper Devonian
 .....Lime Creek Formation
RTIowa
SNIncludes Juniper Hill, Cerro Gordo, and Owen members. Central N Iowa.
Limerick Ireland  search
BTEurope
 .Western Europe
 ..Ireland
 ...Limerick Ireland
SNCounty in W central Ireland.
limestone  search
BTsedimentary rocks
 .carbonate rocks
 ..limestone
NTalgal limestone
 biocalcarenite
 biomicrite
 biosparite
 calcarenite
 calcilutite
 coquina
 dolomitic limestone
 micrite
 microcrystalline limestone
 oolitic limestone
RTtripoli
 calcite
 algal mounds
 allochems
 oolite
 calcium carbonate
 limestone deposits
 chalk
 travertine
 dolomitization
 carbonate sediments
 jasperoid
 metalimestone
 oolitic texture
 ophicalcite
 pisolites
SNAs of 1981, use limestone deposits for limestone as a commodity.
Limestone Alps  search
BTEurope
 .Alps
 ..Limestone Alps
NTNorthern Limestone Alps
RTSwitzerland
 Italy
 France
 Croatia
 Austria
 Germany
SNMay occur in various locations. Search in combination with country of interest. As of 1995, instead use Northern Limestone Alps for the northerly branch of Eastern Alps which occurs chiefly in Austria and S Bavaria. Use Dolomites for that range in N Italy
Limestone County Alabama  search
BTUnited States
 .Alabama
 ..Limestone County Alabama
SNN Alabama.
Limestone County Texas  search
BTUnited States
 .Texas
 ..Limestone County Texas
SNE central Texas.
limestone deposits  search
RTbuilding stone
 cement materials
 chalk deposits
 construction materials
 crushed stone
 dimension stone
 dolostone deposits
 lime
 limestone
 marble deposits
 ornamental materials
SNCommodity. See List C.
limit, elastic  search
USEelastic limit
limits, Atterberg  search
USEAtterberg limits
Limnocardium  search
BTInvertebrata
 .Mollusca
 ..Bivalvia
 ...Limnocardium
SNGenus.
limnology  search
RTgeomorphology
 glacial lakes
 hydrology
 lacustrine features
 lakes
 paleolimnology
 ponds
 seiches
Limon earthquake 1991  search
USECosta Rica earthquake 1991
limonite  search
BToxides
 .limonite
RTiron ores
 iron oxides
 ocher
 iron minerals
 hydrogoethite
SNBefore 1981, included use as a commodity term under iron. As of 1981, may be used as a commodity term.
Limousin  search
BTEurope
 .Western Europe
 ..France
 ...Limousin
SNHistorical region in S central France.
Limpopo Basin  search
BTAfrica
 .Limpopo Basin
UFCrocodile River basin
RTSouth Africa
 Transvaal region
 Botswana
 Zimbabwe
 Northern Province South Africa
 Mozambique
SNRiver basin. Also search Limpopo. Indexed with countries as applicable.
Limpopo Belt  search
BTAfrica
 .Limpopo Belt
RTPrecambrian
 Kaapvaal Craton
 Limpopo Orogeny
 South Africa
 Botswana
 Zimbabwe
 Mozambique
SNOrogenic belt at the N margin of the Kaapvaal Craton in S Africa. Consists of Precambrian metamorphic rocks (the Messina Formation in South Africa). Also search Limpopo. Indexed with countries as applicable. Added to Thesaurus in 1981.
Limpopo Orogeny  search
RTArchean
 Botswana
 Limpopo Belt
 Mozambique
 orogeny
 South Africa
 Zimbabwe
SNArchean. Added to Thesaurus in 1995.
Limski Channel  search
BTEurope
 .Southern Europe
 ..Croatia
 ...Limski Channel
RTIstria
SNOn Istria Peninsula SW of Rijeka.
Lincoln County Arkansas  search
BTUnited States
 .Arkansas
 ..Lincoln County Arkansas
SNSE Arkansas.
Lincoln County Colorado  search
BTUnited States
 .Colorado
 ..Lincoln County Colorado
SNE central Colorado.
Lincoln County Georgia  search
BTUnited States
 .Georgia
 ..Lincoln County Georgia
SNNE Georgia.
Lincoln County Idaho  search
BTUnited States
 .Idaho
 ..Lincoln County Idaho
SNS Idaho.
Lincoln County Kansas  search
BTUnited States
 .Kansas
 ..Lincoln County Kansas
SNCentral Kansas.
Lincoln County Kentucky  search
BTUnited States
 .Kentucky
 ..Lincoln County Kentucky
SNCentral Kentucky.
Lincoln County Maine  search
BTUnited States
 .Maine
 ..Lincoln County Maine
SNS Maine.
Lincoln County Minnesota  search
BTUnited States
 .Minnesota
 ..Lincoln County Minnesota
SNSW Minnesota.
Lincoln County Mississippi  search
BTUnited States
 .Mississippi
 ..Lincoln County Mississippi
SNSW Mississippi.
Lincoln County Missouri  search
BTUnited States
 .Missouri
 ..Lincoln County Missouri
SNE Missouri.
Lincoln County Montana  search
BTUnited States
 .Montana
 ..Lincoln County Montana
RTPurcell Mountains
SNExtreme NW Montana.
Lincoln County Nebraska  search
BTUnited States
 .Nebraska
 ..Lincoln County Nebraska
SNSW central Nebraska.
Lincoln County Nevada  search
BTUnited States
 .Nevada
 ..Lincoln County Nevada
RTEgan Range
SNSE Nevada.
Lincoln County New Mexico  search
BTUnited States
 .New Mexico
 ..Lincoln County New Mexico
RTOrogrande Basin
 Sierra Blanca
SNS central New Mexico.
Lincoln County North Carolina  search
BTUnited States
 .North Carolina
 ..Lincoln County North Carolina
SNW central North Carolina.
Lincoln County Oklahoma  search
BTUnited States
 .Oklahoma
 ..Lincoln County Oklahoma
SNCentral Oklahoma.
Lincoln County Oregon  search
BTUnited States
 .Oregon
 ..Lincoln County Oregon
NTNewport Oregon
 Yaquina Bay
SNW Oregon.
Lincoln County South Dakota  search
BTUnited States
 .South Dakota
 ..Lincoln County South Dakota
SNSE South Dakota.
Lincoln County Tennessee  search
BTUnited States
 .Tennessee
 ..Lincoln County Tennessee
SNS Tennessee.
Lincoln County Washington  search
BTUnited States
 .Washington
 ..Lincoln County Washington
NTOdessa Washington
SNE Washington.
Lincoln County West Virginia  search
BTUnited States
 .West Virginia
 ..Lincoln County West Virginia
SNW West Virginia.
Lincoln County Wisconsin  search
BTUnited States
 .Wisconsin
 ..Lincoln County Wisconsin
SNN central Wisconsin.
Lincoln County Wyoming  search
BTUnited States
 .Wyoming
 ..Lincoln County Wyoming
RTMoxa Arch
SNW Wyoming.
Lincoln Creek Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Tertiary
 ....Lincoln Creek Formation
RTEocene
 Oligocene
 Miocene
 Washington
SNVaguely defined. SW Washington. Also search Lincoln Formation and Washington.
Lincoln Parish Louisiana  search
BTUnited States
 .Louisiana
 ..Lincoln Parish Louisiana
SNN Louisiana.
Lincolnshire England  search
BTEurope
 .Western Europe
 ..United Kingdom
 ...Great Britain
 ....England
 .....Lincolnshire England
RTGibraltar Point
 Humberside England
SNCounty on the North Sea in E England. In 1974, Humberside County was formed from part.
Lincolnshire Limestone  search
RTEngland
 Jurassic
 Ordovician
 Tennessee
 Virginia
SNOrdovician formation in SW Virginia and NW Tennessee, and a Jurassic formation in England. Also search Lincolnshire Formation for the one in the United States; also search Lincolnshire Limestone Formation for the one in England. Indexed with ages as appli
Lindlar Germany  search
BTEurope
 .Central Europe
 ..Germany
 ...North Rhine-Westphalia Germany
 ....Lindlar Germany
SNVillage in North Rhine-Westphalia, W Germany.
line defects  search
USEcrystal dislocations
Line Islands  search
BTOceania
 .Polynesia
 ..Line Islands
NTFanning Island
RTEast Pacific Ocean Islands
 Pacific Ocean
 Christmas Island
 Kiribati
 DSDP Site 314
 DSDP Site 315
 DSDP Site 316
SNGroup S of Hawaiian Islands, N and S of Equator. Some belong to U.S., some to Kiribati.
line of strike  search
USEstrike
lineaments  search
UFtectonic lines
RTtectonics
 faults
 remote sensing
 lineation
 fault zones
linear distortion  search
RTdistortion
 elastic waves
 seismology
SNAdded to Thesaurus in 1981.
linear materials  search
RTengineering geology
 materials
 stiffness
SNAdded to Thesaurus in 1981.
linear orientation  search
RTorientation
SNBefore 1978, search linear.
linear programming  search
RTcomputer programs
 data processing
 mathematical models
SNAdded to Thesaurus in 1985.
lineation  search
UFlineations
RTigneous rocks
 metamorphic rocks
 metamorphism
 deformation
 folds
 fractures
 intrusions
 cleavage
 foliation
 bedding
 boudinage
 slickensides
 orientation
 elongate minerals
 fabric
 preferred orientation
 lineaments
 flow lines
 slickenlines
 mullions
 parting lineation
SNSmall-scale linear features. For large-scale features, see lineaments.
lineations  search
USElineation
liners  search
USEdisposal barriers
lines, flow  search
USEflow lines
Lingula  search
BTInvertebrata
 .Brachiopoda
 ..Inarticulata
 ...Lingula
SNGenus.
Linn County Iowa  search
BTUnited States
 .Iowa
 ..Linn County Iowa
SNE Iowa.
Linn County Kansas  search
BTUnited States
 .Kansas
 ..Linn County Kansas
SNE Kansas.
Linn County Missouri  search
BTUnited States
 .Missouri
 ..Linn County Missouri
SNN central Missouri.
Linn County Oregon  search
BTUnited States
 .Oregon
 ..Linn County Oregon
RTMount Jefferson
SNW Oregon.
linnaeite  search
BTsulfides
 .linnaeite
UFcobalt pyrites
 linneite
RTcarrollite
 polydymite
 siegenite
linneite  search
USElinnaeite
Linz Austria  search
BTEurope
 .Central Europe
 ..Austria
 ...Upper Austria
 ....Linz Austria
SNCity in NW Upper Austria.
liolitidae  search
NTHeliolites
Lipari Island  search
BTEurope
 .Southern Europe
 ..Italy
 ...Sicily Italy
 ....Lipari Islands
 .....Lipari Island
Lipari Islands  search
BTEurope
 .Southern Europe
 ..Italy
 ...Sicily Italy
 ....Lipari Islands
NTLipari Island
 Stromboli
 Vulcano
UFAeolian Islands
SNGroup of small volcanic islands in SE Tyrrhenian Sea off N coast of Sicily. Also search Lipari.
liparite  search
BTigneous rocks
 .volcanic rocks
 ..rhyolites
 ...liparite
liparite porphyry  search
BTigneous rocks
 .volcanic rocks
 ..rhyolites
 ...liparite porphyry
RTporphyry
lipids  search
BTorganic compounds
 .organic acids
 ..fatty acids
 ...lipids
Lippe Valley  search
BTEurope
 .Central Europe
 ..Germany
 ...North Rhine-Westphalia Germany
 ....Lippe Valley
SNValley of Lippe River, which flows into the Rhine River at Wesel, W Germany. Also search Lippe.
Lipscomb County Texas  search
BTUnited States
 .Texas
 ..Lipscomb County Texas
liptinite  search
USEexinite
liquefaction  search
RTcoseismic processes
 geologic hazards
 geomorphology
 liquefaction potential
 mass movements
 sediments
 slope stability
 slumping
 soil mechanics
SNNot to be used under phase equilibria.
liquefaction potential  search
RTengineering geology
 geologic hazards
 liquefaction
 slope stability
SNAdded to Thesaurus in 1981.
liquid  search
USEliquid phase
liquid chromatography  search
RTchromatography
 ion chromatography
SNAdded to Thesaurus in 1985.
liquid inclusions  search
USEfluid inclusions
liquid phase  search
UFliquid
RTHenry's law
 boiling
 gaseous phase
 dense nonaqueous phase liquids
 fluid phase
 nonaqueous phase liquids
 light nonaqueous phase liquids
 solid phase
 melts
 silicate melts
SNBefore 1978, also search liquid.
liquid scintillation methods  search
UFscintillation methods, liquid
RTmass spectroscopy
 chemical analysis
 radioactivity
 radioactivity methods
 scintillations
SNAdded to Thesaurus in 1995.
liquid waste  search
UFwaste, liquid
RTengineering geology
 environmental geology
 ground water
 waste disposal
 chemical waste
 radioactive waste
 waste disposal sites
 industrial waste
 solid waste
 waste water
 detergents
 effluents
 sludge
 Resource Conservation and Recovery Act
Lisbon Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Eocene
 .....middle Eocene
 ......Lisbon Formation
RTMississippi
 Alabama
 Georgia
 Claiborne Group
SNIn Claiborne Group. Georgia, Mississippi and SW Alabama. Added to Thesaurus in 1985.
Lisbon Portugal  search
BTEurope
 .Southern Europe
 ..Iberian Peninsula
 ...Portugal
 ....Lisbon Portugal
SNCapital and port city, Lisboa district, SW coast of Portugal. Before 1993, also search Lisboa AND Portugal. Before 1998, this may have been used for other parts of Lisboa District. Indexed with Lisboa Portugal.
Lisburne Group  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Lisburne Group
RTCarboniferous
 Permian
 Alaska
 Kayak Shale
 Kanayut Conglomerate
 Wahoo Limestone
SNMississippian to Permian. Includes Wachsmuth Limestone, Alapah Limestone, Kayak Shale, Kanayut Conglomerate. N Alaska. Indexed with ages as applicable.
Lissamphibia  search
BTChordata
 .Vertebrata
 ..Tetrapoda
 ...Amphibia
 ....Lissamphibia
NTAnura
 Caudata
SNSubclass.
list, faunal  search
USEfaunal list
listric faults  search
BTfaults
 .listric faults
RTaccommodation zones
 hinge faults
 normal faults
 slumping
 growth faults
 half grabens
SNAdded to Thesaurus in 1985.
listvenite  search
BTsilicates
 .sheet silicates
 ..mica group
 ...listvenite
listwanite  search
BTmetamorphic rocks
 .schists
 ..listwanite
SNCompositional term.
Litchfield County Connecticut  search
BTUnited States
 .Connecticut
 ..Litchfield County Connecticut
NTWoodbury Connecticut
SNNW Connecticut.
litharenite  search
BTsedimentary rocks
 .clastic rocks
 ..arenite
 ...litharenite
RTsandstone
 terrigenous materials
 graywacke
 subgraywacke
SNAlso search lithic arenite. Added to Thesaurus in 1995.
lithification  search
RTcementation
 coal
 compaction
 compression
 consolidation
 crystallization
 diagenesis
 recrystallization
 sedimentation
 sediments
lithiophilite  search
BTphosphates
 .lithiophilite
lithiophorite  search
BToxides
 .lithiophorite
lithium  search
BTmetals
 .alkali metals
 ..lithium
NTLi-6
 Li-7
UFLi
RTamblygonite
 lithium ores
SNChemical element. Use lithium ores for lithium as a commodity.
lithium ores  search
BTmetal ores
 .lithium ores
RTlithium
 spodumene
 petalite
lithofacies  search
RTfacies
 hardground
 ichnofabric
 lithosomes
 reefs
 sedimentary rocks
 sediments
 seismic stratigraphy
 stratigraphic wedges
 Waulsortian facies
lithofacies maps  search
BTmaps
 .lithofacies maps
RTlithologic maps
SNBefore 1978, search maps AND lithofacies. Added to Thesaurus in 1996.
lithogeochemical methods  search
SNNot a valid term for GeoRef. See geochemical methods, geochemical surveys, or lithogeochemistry.
lithogeochemistry  search
BTgeochemistry
 .lithogeochemistry
RTchemical analysis
 igneous rocks
 composition
 metamorphic rocks
 metasomatism
 metamorphism
 geochemical anomalies
 iron-rich composition
 geologic thermometry
 fluid inclusions
 migration of elements
 geologic barometry
 devitrification
 geochemical logging
 fugacity
SNbefore 1993, also search geochemistry and rock type. Added to Thesaurus in 1993.
lithologic controls  search
RTcontrols
 mineral deposits, genesis
 stratigraphic controls
SNBefore 1978, search lithologic and controls.
lithologic maps  search
BTmaps
 .lithologic maps
RTlithofacies maps
SNBefore 1978, search maps AND lithologic.
lithologic traps  search
USEstratigraphic traps
lithology  search
SNAs of 1981, no longer a valid term for GeoRef. See petrology.
lithophile elements  search
UFoxyphile elements
RTaluminum
 chalcophile elements
 boron
 chemical elements
 calcium
 cerium
 lanthanum
 selenium
 siderophile elements
 manganese
 uranium
 potassium
 rubidium
 sodium
SNChemical elements which tend to concentrate in silicate phases of meteorites. Also, an element possessing greater free energy of oxidation per gram of oxygen than iron. Before 1978, also search lithophile.
Lithophyllum  search
BTPlantae
 .algae
 ..Rhodophyta
 ...Corallinaceae
 ....Lithophyllum
RTmicrofossils
SNIndexed with microfossils if applicable.
Lithoprobe  search
RTgeophysical methods
 geophysical surveys
 geotraverses
 lithosphere
 reflection methods
 seismic methods
 seismic profiles
SNProgram for seismic reflection profiling of the lithosphere. Added to Thesaurus in 1989.
lithosiderite  search
USEstony irons
Lithosols  search
BTsoils
 .Lithosols
lithosomes  search
RTfacies
 lithofacies
 sedimentary rocks
 sediments
SNAdded to Thesaurus in 1995.
lithosphere  search
RTasthenosphere
 Benioff zone
 biosphere
 core
 crust
 crustal thickening
 delamination
 Earth
 KRISP
 Lithoprobe
 lower crust
 mantle
 Mohorovicic discontinuity
 ophiolite complexes
 PASSCAL
 plate tectonics
 swells
 tectonophysics
 tectonosphere
 underplating
lithostatic pressure  search
UFgeostatic pressure
 ground pressure
 overburden pressure
 rock pressure
RTrock mechanics
 soil mechanics
 pressure
 overpressure
SNVertical pressure at a point in the Earth's crust, equal to the pressure caused by the weight of a column of the overlying rock or soil. Added to Thesaurus in 1998.
lithostratigraphy  search
UFpetrostratigraphy
 rock-stratigraphy
RTmetamorphic rocks
 sedimentary rocks
 stratigraphic units
 stratigraphy
 sediments
 unconformities
 hardground
 sequence stratigraphy
 outliers
 tectonostratigraphic units
 stratigraphic gaps
 seismic stratigraphy
 stratigraphic wedges
Lithothamnion  search
USELithothamnium
Lithothamnium  search
BTPlantae
 .algae
 ..Rhodophyta
 ...Corallinaceae
 ....Lithothamnium
UFLithothamnion
RTmicrofossils
SNGenus. Indexed with microfossils if applicable.
lithotypes  search
NTclarain
 durain
 fusain
 vitrain
RTbituminous coal
 coal
 humic coal
 macerals
 sapropelite
SNVisible bands in humic coals. Lithotypes for bituminous coal are vitrain, clarain, durain, and fusain; beds or bands of cannel and boghead coals (sapropelite) are sometimes included. Added to Thesaurus in 1998.
Lithuania  search
BTEurope
 .Baltic region
 ..Lithuania
NTSventoji River
 Vilna Lithuania
RTBaltic Glaciation
 Baltica
 Neman River basin
 Russian Plain
 Courland Spit
SNFormer Lithuanian Soviet Socialist Republic.
Litopterna  search
BTChordata
 .Vertebrata
 ..Tetrapoda
 ...Mammalia
 ....Theria
 .....Eutheria
 ......Litopterna
RTUngulata
SNOrder.
Litorina Sea  search
BTwer Holocene
 .Litorina Sea
RTFinland
 Sweden
 Baltic Glaciation
 Baltic region
 Norway
SNLower Holocene. Stage of Baltic Glaciation. Baltic region. Indexed with countries as applicable. Added to Thesaurus in 1993.
Little Bahama Bank  search
BTAtlantic Ocean
 .North Atlantic
 ..Little Bahama Bank
RTBahamas
 Great Bahama Bank
 Leg 101
 Northwest Providence Channel
 ODP Site 628
 ODP Site 629
 ODP Site 630
SNShoal in N Bahamas, between Grand Bahama and Great Abaco islands. Added to Thesaurus in 1985.
Little Belt Mountains  search
BTUnited States
 .U. S. Rocky Mountains
 ..Little Belt Mountains
BTUnited States
 .Montana
 ..Little Belt Mountains
RTCascade County Montana
 Judith Basin County Montana
SNRange of the Rocky Mountains in central Montana. This term has multiple hierarchies.
Little Falls Formation  search
RTMinnesota
 New York
 Paleoproterozoic
 Potsdam Sandstone
 Upper Cambrian
SNRepresents an offshore, more carbonate phase of Potsdam Sandstone, Galway Formation, and perhaps even part of Hoyt Limestone in the Upper Cambrian of E central and E New York. Also used for a Paleoproterozic formation in Minnesota. Indexed with age as app
Little Ice Age  search
USENeoglacial
Little Khingan Mountains  search
USEXiao Hinggan Ling
Little Maria Mountains  search
BTUnited States
 .California
 ..Riverside County California
 ...Little Maria Mountains
RTBig Maria Mountains
SNSE California. Added to Thesaurus in 1985.
Little Missouri River basin  search
BTUnited States
 .Little Missouri River basin
RTWyoming
 Montana
 North Dakota
 South Dakota
SNAlso search Little Missouri River. Indexed with states as applicable.
Little River County Arkansas  search
BTUnited States
 .Arkansas
 ..Little River County Arkansas
Little Skull Mountain earthquake 1992  search
BTearthquakes
 .Little Skull Mountain earthquake 1992
RTNevada
 Yucca Mountain
 Landers earthquake 1992
SNEpicenter is 22 miles from Yucca Mountain, SW Nevada.
Little Walachia  search
USEOltenia
Littleton Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Devonian
 ....Lower Devonian
 .....Littleton Formation
RTVermont
 Massachusetts
 New Hampshire
SNIncludes Gove Member, Hubbard Hill Member, May Pond Member, Dakin Hill Member, Pittsfield Member, Jenness Pond Member, Durgin Brook Member. Central and S New Hampshire, N central Massachusetts, and SE Vermont.
littoral  search
SNA valid term through 1977. As of 1981, use intertidal environment.
littoral cells  search
RTcoastal environment
 geomorphology
 lacustrine environment
 longshore currents
 sediment transport
 sedimentation
 shorelines
SNAdded to Thesaurus in 1995.
littoral drift  search
UFlongshore drift
 shore drift
RTsediments
 longshore currents
 progradation
littoral environment  search
USEintertidal environment
littoral erosion  search
BTerosion
 .littoral erosion
UFbeach erosion
RTgeomorphology
 marine environment
 barrier islands
 shorelines
 beaches
 bars
 capes
 beach profiles
 marine terraces
 coastal environment
 benches
 wave-cut platforms
 ocean waves
 intertidal environment
 spits
 nearshore environment
 tides
SNBefore 1982, also search erosion AND (beaches OR beach). Added to Thesaurus in 1982.
Lituolacea  search
BTInvertebrata
 .Protista
 ..Foraminifera
 ...Textulariina
 ....Lituolacea
NTAmmobaculites
 Ataxophragmiidae
 Lituolidae
 Orbitolinidae
 Trochammina
RTmicrofossils
SNIndexed with microfossils if applicable.
Lituolidae  search
BTInvertebrata
 .Protista
 ..Foraminifera
 ...Textulariina
 ....Lituolacea
 .....Lituolidae
BTmicrofossils
 .Lituolidae
NTHaplophragmoides
SNFamily. This term has multiple hierarchies.
Live Oak County Texas  search
BTUnited States
 .Texas
 ..Live Oak County Texas
SNS Texas.
Livermore California  search
BTUnited States
 .California
 ..Alameda County California
 ...Livermore California
RTLawrence Livermore National Laboratory
SNE of San Francisco Bay, Northern California.
Liverpool Bay  search
BTEurope
 .Western Europe
 ..United Kingdom
 ...Great Britain
 ....England
 .....Liverpool Bay
RTLancashire England
SNInlet of Irish Sea off Liverpool. Also search Liverpool.
living fossils  search
RTfossils
 living taxa
SNAdded to Thesaurus in 1981.
living materials  search
USEliving taxa
living taxa  search
UFculture, living
 extant taxa
 living materials
 taxa, living
RTecology
 fossils
 biota
 thermophilic taxa
 faunal studies
 floral studies
 living fossils
SNUsed when organisms are studied while they are still living.
Livingston County Illinois  search
BTUnited States
 .Illinois
 ..Livingston County Illinois
SNE central Illinois.
Livingston County Kentucky  search
BTUnited States
 .Kentucky
 ..Livingston County Kentucky
SNSW Kentucky.
Livingston County Michigan  search
BTUnited States
 .Michigan
 ..Michigan Lower Peninsula
 ...Livingston County Michigan
SNSE Michigan.
Livingston County Missouri  search
BTUnited States
 .Missouri
 ..Livingston County Missouri
SNN central Missouri.
Livingston County New York  search
BTUnited States
 .New York
 ..Livingston County New York
NTSpringwater New York
RTGenesee River
SNW central New York.
Livingston Island  search
BTAntarctica
 .South Shetland Islands
 ..Livingston Island
RTFalse Bay
SNOne of South Shetland Islands in British Antarctic Territory off the Antarctic Peninsula. This term has multiple hierarchies.
Livingston Parish Louisiana  search
BTUnited States
 .Louisiana
 ..Livingston Parish Louisiana
SNSE Louisiana.
Livorno Italy  search
BTEurope
 .Southern Europe
 ..Italy
 ...Tuscany Italy
 ....Livorno Italy
UFLeghorn Italy
SNProvince in NW Tuscany. Also a city on the Ligurian Sea now known as Leghorn.
lixiviation  search
USEleaching
lizardite  search
BTsilicates
 .sheet silicates
 ..serpentine group
 ...lizardite
Ljubljana Slovenia  search
BTEurope
 .Southern Europe
 ..Slovenia
 ...Ljubljana Slovenia
UFLjubljana Yugoslavia
 Lyublyana Slovenia
SNCapitol city and administrative region in central Slovenia. Before 1993, Ljubljana Yugoslavia was also used.
Ljubljana Yugoslavia  search
USELjubljana Slovenia
LL chondrites  search
BTmeteorites
 .stony meteorites
 ..chondrites
 ...LL chondrites
NTChainpur Meteorite
 Innisfree Meteorite
 Krymka Meteorite
 Semarkona Meteorite
UFLL-group chondrites
SNAdded to Thesaurus in 1981.
LL-group chondrites  search
USELL chondrites
Llajas Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Eocene
 .....Llajas Formation
RTCalifornia
SNLower and middle Eocene. S California. Added to Thesaurus in 1989.
Llandeilian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Ordovician
 ....Middle Ordovician
 .....Llandeilian
RTBorrowdale Volcanic Series
SNEurope. Above Llanvirnian, below lower Caradocian.
Llandoverian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Silurian
 ....Lower Silurian
 .....Llandoverian
NTInterlake Formation
UFValentian
RTLlandovery Wales
SNValentian. Europe. Above Ashgillian (Ordovician), below Wenlockian.
Llandovery  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Silurian
 ....Llandovery
NTRhuddanian
 Aeronian
 Telychian
SNNo longer a valid term for GeoRef.See Llandovery Wales. Before 1978, this term was often used for the age term, Llandoverian.
Llandovery Wales  search
BTEurope
 .Western Europe
 ..United Kingdom
 ...Great Britain
 ....Wales
 .....Dyfed Wales
 ......Llandovery Wales
RTLlandoverian
SNTown in S Wales. Before 1978, Llandovery was often used for the age term.
Llano County Texas  search
BTUnited States
 .Texas
 ..Llano County Texas
NTLlano Texas
RTLlano Uplift
SNCentral Texas.
Llano Estacado  search
BTUnited States
 .Llano Estacado
UFStaked Plain
RTNew Mexico
 Oklahoma
 Texas
 Southern Great Plains
SNVast plateau. Indexed with states as applicable.
Llano Texas  search
BTUnited States
 .Texas
 ..Llano County Texas
 ...Llano Texas
SNTown in central Texas.
Llano Uplift  search
BTUnited States
 .Texas
 ..Llano Uplift
RTLlano County Texas
Llanos  search
UFLlanos Basin
RTSouth America
 Colombia
 Venezuela
 Orinoco River basin
SNVast plains drained by the Orinoco River. Indexed with countries as applicable.
Llanos Basin  search
USELlanos
Llanvirnian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Ordovician
 ....Middle Ordovician
 .....Llanvirnian
RTBuchans Group
 Borrowdale Volcanic Series
SNEurope. Above Arenigian, below Llandeilian.
Llewn Promontory  search
USELleyn Peninsula
lley#Aztec Sandstone#Balaklala Rhyolite#Barstow Formation#Basin and Range Provin  search
Lleyn Peninsula  search
BTEurope
 .Western Europe
 ..United Kingdom
 ...Great Britain
 ....Wales
 .....Caernarvonshire Wales
 ......Lleyn Peninsula
UFLlewn Promontory
SNHeadland extending SW into Saint George's Channel from NW Wales.
Llobregat River basin  search
BTEurope
 .Southern Europe
 ..Iberian Peninsula
 ...Spain
 ....Catalonia Spain
 .....Llobregat River basin
RTBarcelona Spain
 Lerida Spain
SNIn Catalonia, NE Spain. Also search Llobregat River. Indexed with province as applicable.
llsborough County New Hampshire  search
NTManchester New Hampshire
LNAPLs  search
USElight nonaqueous phase liquids
load casts  search
BTsedimentary structures
 .turbidity current structures
 ..load casts
UFcasts, load
RTbedding plane irregularities
 flame structures
 soft sediment deformation
 casts
 sole marks
 flute casts
SNAlso index bedding plane structures or soft sediment structures if applicable (See list K.)
load pressure  search
RTdynamic loading
 engineering geology
 load tests
 pressure
load tests  search
RTcyclic loading
 engineering geology
 lateral loading
 load pressure
 loading
 rock mechanics
 soil mechanics
 testing
SNAdded to Thesaurus in 1982.
loading  search
NTcyclic loading
 dynamic loading
 lateral loading
RTBoussinesq equation
 critical load
 fatigue
 load tests
 soil mechanics
loam  search
BTsoils
 .loam
RTsand
 clay
 silt
 loess
Loanda Angola  search
USELuanda Angola
loans  search
RTeconomics
SNUsually out-of-scope for GeoRef. Added to Thesaurus in 1981.
lobes, glacial  search
USEglacial lobes
localities  search
SNNot a valid term for GeoRef. As of 1993, see fossil localities, mineral localities, or type localities.
localization  search
RTconcentration
 metasomatism
 mineral deposits, genesis
 mineralization
 minerals
 sedimentation
SNUsed for concentration of minerals.
location maps  search
USEsite location maps
locene  search
NTAtlantic
 Boreal
 Flandrian
 Hat Creek Basalt
 lower Holocene
 middle Holocene
 Neoglacial
 Preboreal
 Subboreal
 upper Holocene
 Versilian
Loch Lomond  search
RTCape Breton Island
 Central region Scotland
 Nova Scotia
 Strathclyde region Scotland
SNS central Scotland. Also a lake in Nova Scotia. Before 1993 also used for various town names. Indexed with regions as applicable.
Loch Lomond Stade  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Quarternary
 ....Pleistocene
 .....Upper Pleistocene
 ......Weichselian
 .......Loch Lomond Stade
UFLoch Lomond Stadial
SNEurope. Added to Thesaurus in 1989.
Loch Lomond Stadial  search
USELoch Lomond Stade
Lochkovian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Devonian
 ....Lower Devonian
 .....Lochkovian
SNEurope.
Lockatong Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Triassic
 ....Upper Triassic
 .....Lockatong Formation
RTPennsylvania
 New York
 New Jersey
 Newark Supergroup
SNIn Newark Supergroup. New Jersey, S New York and SE Pennsylvania. Added to Thesaurus in 1989.
Lockport Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Silurian
 ....Middle Silurian
 .....Niagaran
 ......Lockport Formation
RTOntario
 Kentucky
 Ohio
 Pennsylvania
 New York
 West Virginia
 Michigan
SNIncludes Gasport Dolomite, Suspension Bridge Dolomite and Eramosa Dolomite members at Niagara Gorge. In New York, includes DeCew Waterlime, Gasport Limestone, Goat Island, Oak Orchard members, Devils Hole Dolomite, and Oakfield Limestone.
locomotion  search
RTbiomechanics
 bipedalism
 flight
 fossils
 pelvises
 wings
Lodeve Basin  search
BTrault France
 .Lodeve Basin
SNS France.
Lodeve France  search
BTrault France
 .Lodeve France
SNTown in N Herault, S France.
lodgement till  search
BTsediments
 .clastic sediments
 ..till
 ...lodgement till
UFlodgment till
RTglacial geology
 glacial features
SNAdded to Thesaurus in 1989.
Lodgepole Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Mississippian
 .....Lower Mississippian
 ......Lodgepole Formation
RTUtah
 Wyoming
 Montana
 Madison Group
SNIn Madison Group. Includes Paine member, Woodhurst Member, Little Chief Canyon Member. SW Montana, NE Utah, and E Wyoming.
lodgment till  search
USElodgement till
lodranite  search
BTmeteorites
 .stony irons
 ..lodranite
Lodz Poland  search
BTEurope
 .Central Europe
 ..Poland
 ...Lodz Poland
RTBelchatow Mine
 Belchatow Poland
 Widawka Basin
SNProvince and city in central Poland.
loellingite  search
USElollingite
loess  search
BTsediments
 .clastic sediments
 ..loess
UFlehm
RTgeomorphology
 silt
 soil mechanics
 terrigenous materials
 marl
 eolian features
 deflation
 drift
 loam
Loess Plateau  search
BTAsia
 .Far East
 ..China
 ...Loess Plateau
UFHuangtu Plateau
RTShanxi China
 Gansu China
 Shaanxi China
SNRestricted to location in central China. Before 1995, search in combination with China. Indexed with Shanxi China and/or Shaanxi China and/or Gansu China as applicable. Added to Thesaurus in 1995.
Lofoten Islands  search
BTEurope
 .Western Europe
 ..Scandinavia
 ...Norway
 ....Nordland Norway
 .....Lofoten Islands
RTAtlantic Ocean Islands
SNIsland group in Norwegian Sea off NW mainland. Also search Lofoten.
log, road  search
USEroad log
Logan County Arkansas  search
BTUnited States
 .Arkansas
 ..Logan County Arkansas
SNW Arkansas.
Logan County Colorado  search
BTUnited States
 .Colorado
 ..Logan County Colorado
SNNE Colorado.
Logan County Illinois  search
BTUnited States
 .Illinois
 ..Logan County Illinois
SNCentral Illinois.
Logan County Kansas  search
BTUnited States
 .Kansas
 ..Logan County Kansas
SNW Kansas.
Logan County Kentucky  search
BTUnited States
 .Kentucky
 ..Logan County Kentucky
SNS Kentucky.
Logan County Nebraska  search
BTUnited States
 .Nebraska
 ..Logan County Nebraska
SNCentral Nebraska.
Logan County North Dakota  search
BTUnited States
 .North Dakota
 ..Logan County North Dakota
SNS North Dakota.
Logan County Ohio  search
BTUnited States
 .Ohio
 ..Logan County Ohio
SNW central Ohio.
Logan County Oklahoma  search
BTUnited States
 .Oklahoma
 ..Logan County Oklahoma
SNCentral Oklahoma.
Logan County West Virginia  search
BTUnited States
 .West Virginia
 ..Logan County West Virginia
SNSW West Virginia.
Logan Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Mississippian
 .....Logan Formation
RTKentucky
 Ohio
SNComprises Beyer, Allensville, and Vinton members. NE Kentucky, and Ohio.
Logar Afghanistan  search
BTAsia
 .Indian Peninsula
 ..Afghanistan
 ...Logar Afghanistan
SNUse for the province in E Afghanistan.
logging  search
SNNot a valid term for GeoRef. See well-logging or for specific types see acoustical logging, caliper logging, dipmeter logging, electrical logging, electromagnetic logging, geochemical logging, gravity logging, magnetic logging, seismic logging, or tempera
Logone River  search
BTAfrica
 .West Africa
 ..Logone River
RTCameroon
 Chad
SNFlows into the Shari River at Fort Lamy in Chad S of Lake Chad. Also search Logone. Indexed with countries as applicable.
Logrono City Spain  search
BTEurope
 .Southern Europe
 ..Iberian Peninsula
 ...Spain
 ....La Rioja Spain
 .....Logrono City Spain
SNRefers to only the city in N central Spain. Before 1993, also search Logrono Spain.
Logrono Spain  search
SNNo longer a valid term for GeoRef. As of 1998, see the province, La Rioja Spain or the city, Logrono City Spain.
Logudoro  search
BTEurope
 .Southern Europe
 ..Italy
 ...Sardinia Italy
 ....Logudoro
SNRegion in NW Italy.
Loihi Seamount  search
BTPacific Ocean
 .North Pacific
 ..Northeast Pacific
 ...Loihi Seamount
RTHawaii Island
SNN central Pacific Ocean, S of Hawaii. This term has multiple hierarchies. Added to Thesaurus in 1985.
Loir-et-Cher France  search
BTEurope
 .Western Europe
 ..France
 ...Loir-et-Cher France
RTBeauce
SNDepartment in W central France.
Loire France  search
BTEurope
 .Western Europe
 ..France
 ...Loire France
NTSaint-Etienne coal basin
RTMonts du Lyonnais
SNDepartment in S central France.
Loire River  search
BTEurope
 .Western Europe
 ..France
 ...Loire River
SNLongest river in France. Rises in Ardeche Department in SE and flows N and NE into Loiret Department where it turns E emptying into the Bay of Biscay at Saint-Nazaire.
Loire Valley  search
BTEurope
 .Western Europe
 ..France
 ...Loire Valley
SNRiver valley in S central, central, and E central France.
Loire-Atlantique France  search
BTEurope
 .Western Europe
 ..France
 ...Loire-Atlantique France
NTAncenis France
 Nantes France
UFLoire-Inferieure
RTBay of Bourgneuf
SNDepartment in W France. Also search Loire-Inferieure.
Loire-Inferieure  search
USELoire-Atlantique France
Loiret France  search
BTEurope
 .Western Europe
 ..France
 ...Loiret France
NTOrleans France
SNDepartment in N central France.
lollingite  search
BTarsenides
 .lollingite
UFloellingite
RTarsenopyrite
Lom Depression  search
BTEurope
 .Southern Europe
 ..Bulgaria
 ...Vidin Bulgaria
 ....Lom Depression
SNIn vicinity of Lom River and city of Lom in NW Bulgaria.
Loma Prieta earthquake 1989  search
BTearthquakes
 .Loma Prieta earthquake 1989
RTCalifornia
 San Francisco Bay region
 Santa Cruz California
 Santa Cruz County California
SNSanta Cruz County, W California. Added to Thesaurus in 1993.
Lombardy Italy  search
BTEurope
 .Southern Europe
 ..Italy
 ...Lombardy Italy
NTAdamello Massif
 Bergamo Italy
 Brescia Italy
 Como
 Como Italy
 Milan Italy
 Pavia Italy
 Sondrio Italy
 Trompia Valley
 Valtellina
 Varese Italy
RTRhaetian Alps
 Sesia-Lanzo Zone
 Bergell Massif
 Maiolica Limestone
 Po River
 Po Valley
 Lago Maggiore
 Ticino River
SNAutonomous region in N Italy.
Lome Convention  search
RTeconomics
SNUsually out-of-scope for GeoRef. Added to Thesaurus in 1981.
lomonite  search
USElaumontite
Lomonosov Range  search
USELomonosov Ridge
Lomonosov Ridge  search
BTArctic Ocean
 .Lomonosov Ridge
UFLomonosov Range
RTAmerasia Basin
 Makarov Basin
SNN of New Siberian Islands across top of world to N of Greenland.
lomontite  search
USElaumontite
Lompoc California  search
BTUnited States
 .California
 ..Santa Barbara County California
 ...Lompoc California
SNCity in SW California.
Lonar Crater  search
BTAsia
 .Indian Peninsula
 ..India
 ...Maharashtra India
 ....Lonar Crater
RTDeccan Plateau
 impact features
SNImpact crater in the basalt lava flows of the Deccan Plateau, Maharashtra. Added to Thesaurus in 1981.
London Basin  search
BTEurope
 .Western Europe
 ..United Kingdom
 ...Great Britain
 ....England
 .....London Basin
SNSE England.
London Clay  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Eocene
 .....Ypresian
 ......London Clay
RTEngland
 United Kingdom
SNRests on Reading, Woolwich, Blackheath or Oldhaven Beds except in Norfolk to the west of Great Yarmouth. Overlain by the Claygate or Bagshot Beds, except in East Anglia. Occupies greater part of a large triangular area in London Basin bounded roughly by l
London England  search
BTEurope
 .Western Europe
 ..United Kingdom
 ...Great Britain
 ....England
 .....London England
UFGreater London England
RTThames Estuary
 Thames River
SNCity on the Thames River in SE England. As of 1993, also used for the urban county of Greater London.
London Metal Exchange  search
RTassociations
 economics
SNUsually out-of-scope for GeoRef. Added to Thesaurus in 1981.
Londonderry Northern Ireland  search
BTEurope
 .Western Europe
 ..United Kingdom
 ...Northern Ireland
 ....Londonderry Northern Ireland
SNTraditional county in NW Northern Ireland. Includes the smaller administrative region of the same name adopted after 1973. Also includes the city.
Long Beach California  search
BTUnited States
 .California
 ..Los Angeles County California
 ...Long Beach California
SNCity in S California.
Long County Georgia  search
BTUnited States
 .Georgia
 ..Long County Georgia
Long Duration Ex  search
Long Duration Exposure Facility  search
UFLDEF
RTremote sensing
 satellite methods
 laboratory studies
SNAbbreviated LDEF. Added to Thesaurus in 1998.
Long Island  search
RTAtlantic Ocean Islands
 Bay Park New York
 Block Island Sound
 Fire Island
 Great South Bay
 Kings County New York
 Narrows
 Nassau County New York
 New York
 Outer Hebrides
 Pine Barrens
 Queens County New York
 Suffolk County New York
SNLying between Long Island Sound on N and Atlantic Ocean on S in S New York. Also in various other locations. Indexed with counties or regions as applicable.
Long Island Sound  search
BTAtlantic Ocean
 .North Atlantic
 ..Long Island Sound
RTNew York
 Connecticut
 Suffolk County New York
SNBody of water between S shore of Connecticut and N shore of Long Island, New York.
long period waves  search
USElong-period waves
Long Valley  search
RTCalifornia
 Inyo County California
 Mono County California
 Morris County New Jersey
 Nevada
 New Jersey
 New Jersey Highlands
 White Pine County Nevada
SNE California, Mono Lake and Owens Valley area. Also in N central New Jersey. Also in White Pine County, E Nevada. Indexed with counties as applicable. Added to Thesaurus in 1993.
Long Valley Caldera  search
BTUnited States
 .California
 ..Mono County California
 ...Long Valley Caldera
RTCasa Diablo
 Sierra Nevada
 Inyo Domes
 Obsidian Dome
 Mammoth Lakes earthquakes
 Mammoth Mountain
SNS Mono County, E California. Added to Thesaurus in 1985.
long-period seismographs  search
BTseismographs
 .long-period seismographs
SNAdded to Thesaurus in 1981.
long-period waves  search
BTelastic waves
 .long-period waves
UFlong period waves
RTseismology
 waves
 seismic waves
 traveltime
SNBefore 1978, search long period or long-period AND waves.
long-wall mining  search
USElongwall mining
longitudinal  search
SNA valid term through 1977. See longitudinal orientation.
longitudinal faults  search
USEstrike faults
longitudinal orientation  search
SNAs of 1981, no longer a valid term for GeoRef. Before 1978, also search longitudinal.
longitudinal wave  search
USEP-waves
longshore bars  search
BTbars
 .longshore bars
UFbarrier bars
RTgeomorphology
 barrier islands
 shorelines
 barrier beaches
 shore features
 sand ridges
 capes
SNIndexed with shore features as applicable.
longshore currents  search
BTcurrents
 .ocean currents
 ..longshore currents
RTocean circulation
 ocean waves
 littoral cells
 littoral drift
 tidal currents
longshore drift  search
USElittoral drift
longwall mining  search
UFlong-wall mining
RTmines
 mining geology
 coal
 coal mines
 underground mining
SNAdded to Thesaurus in 1985.
Lonoke County Arkansas  search
BTUnited States
 .Arkansas
 ..Lonoke County Arkansas
lonsdaleite  search
BTnative elements
 .lonsdaleite
RTmeteorites
 carbon
 chaoite
 diamond
 graphite
SNMeteorite mineral.
Lookingglass Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Eocene
 .....Lookingglass Formation
UFLookinglass Formation
RTOregon
SNSW Oregon. Added to Thesaurus in 1985.
Lookinglass Formation  search
USELookingglass Formation
loparite  search
BToxides
 .niobates
 ..loparite
Lopez de Bertodano Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Upper Cretaceous
 .....Lopez de Bertodano Formation
RTAntarctica
 Seymour Island
 James Ross Island
SNJames Ross Island, Seymour Island and Cockburn Island, Antarctica. Added to Thesaurus in 1989.
Lopingian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Permian
 ....Lopingian
NTWuchiapigian
 Changhsingian
lopoliths  search
BTintrusions
 .lopoliths
RTigneous rocks
 batholiths
 laccoliths
Lorain County Ohio  search
BTUnited States
 .Ohio
 ..Lorain County Ohio
Lord Howe Island  search
BTWest Pacific Ocean Islands
 .Lord Howe Island
SNVolcanic island 435 miles NE of Sydney. Dependency of New South Wales.
Lord Howe Rise  search
BTPacific Ocean
 .South Pacific
 ..Southwest Pacific
 ...Lord Howe Rise
UFLord Howe-Chesterfield Ridge
 Lord Howe-New Zealand Ridge
 Lord Howe-New Zealand Rise
RTLeg 90
 Leg 21
 DSDP Site 207
 DSDP Site 208
 DSDP Site 588
 DSDP Site 589
 DSDP Site 590
 DSDP Site 591
 DSDP Site 592
SNExtends from SW of New Caledonia to W of New Zealand. This term has multiple hierarchies.
Lord Howe-Chesterfield Ridge  search
USELord Howe Rise
Lord Howe-New Zealand Ridge  search
USELord Howe Rise
Lord Howe-New Zealand Rise  search
USELord Howe Rise
Lorrain Formation  search
BTChronostratigraphic Units
 .Precambrian
 ..Proterozoic
 ...Lorrain Formation
RTOntario
 Quebec
 Huronian
 Cobalt Group
SNHuronian Supergroup of the Cobalt Group. Overlies the Gowganda Formation conformably and gradationally.
Lorraine  search
BTEurope
 .Western Europe
 ..France
 ...Lorraine
RTAlsace
 Meurthe-et-Moselle France
 Moselle France
 Vosges France
SNRegion and former province on Belgium and Luxembourg borders in NE France. Indexed with departments as applicable.
Los Alamos County New Mexico  search
BTUnited States
 .New Mexico
 ..Los Alamos County New Mexico
NTLos Alamos National Laboratory
SNN central New Mexico.
Los Alamos National Laboratory  search
BTUnited States
 .New Mexico
 ..Los Alamos County New Mexico
 ...Los Alamos National Laboratory
UFLos Alamos Scientific Laboratory
RTgovernment agencies
 nuclear facilities
 Fenton Hill
 University of California
SNLos Alamos County, 35 miles NW of Santa Fe, in N central New Mexico.
Los Alamos Scientific Laboratory  search
USELos Alamos National Laboratory
Los Angeles Basin  search
BTUnited States
 .California
 ..Los Angeles Basin
RTCajon Pass
 Wilmington Field
 Whittier Narrows earthquake 1987
SNGreater Los Angeles area.
Los Angeles California  search
BTUnited States
 .California
 ..Los Angeles County California
 ...Los Angeles California
RTNorthridge earthquake 1994
SNCity in S California.
Los Angeles County California  search
BTUnited States
 .California
 ..Los Angeles County California
NTInglewood California
 Long Beach California
 Los Angeles California
 Pacoima Dam
 Palmdale California
 Palos Verdes Hills
 Palos Verdes Peninsula
 Pasadena California
 Puente Hills
 Rancho La Brea
 San Clemente Island
 San Fernando California
 Wilmington California
RTMojave Desert
 Channel Islands
 Santa Catalina Island
 Wilmington Field
 Ridge Basin
 Tehachapi Mountains
 San Gabriel Mountains
 San Pedro Bay
 Santa Clara Valley
 Sylmar Fault
SNS California.
Los Angeles earthquake 1994  search
USENorthridge earthquake 1994
Los Azufres  search
BTMexico
 .Michoacan Mexico
 ..Los Azufres
RTgeothermal fields
SNGeothermal field. Michoacan, SW Mexico. Added to Thesaurus in 1989.
Los Humeros  search
BTMexico
 .Puebla Mexico
 ..Los Humeros
RTgeothermal fields
SNPuebla, S central Mexico. Added to Thesaurus in 1989.
Los Islands  search
BTAfrica
 .West Africa
 ..Guinea
 ...Los Islands
UFIles de Loos
RTAtlantic Ocean Islands
SNGroup of small islands in Atlantic Ocean off Conakry.
Los Pedroches Spain  search
BTEurope
 .Southern Europe
 ..Iberian Peninsula
 ...Spain
 ....Andalusia Spain
 .....Cordoba Spain
 ......Los Pedroches Spain
SNRegion N of city of Cordoba in SW central Spain.
Los Testigos  search
BTSouth America
 .Venezuela
 ..Venezuelan Islands
 ...Los Testigos
BTSouth America
 .Venezuela
 ..Nueva Esparta Venezuela
 ...Los Testigos
RTCaribbean Sea
 Caribbean region
SNSmall group of islands SW of Grenada and N of Sucre, Venezuela. This term has multiple hierarchies.
Lost Burro Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Devonian
 ....Lost Burro Formation
RTCalifornia
SNMiddle and Upper Devonian. Includes Lippincott Member, Quartz Spring Sandstone Member. S California.
Lost City  search
RTClark County Nevada
 Lake Mead
SNAncient Indian city now covered by Lake Mead. Relics now housed in Overton in Clark County 5 miles N of original location in S Nevada. Indexed with county or regions as applicable.
Lost River Fault  search
BTUnited States
 .Idaho
 ..Lost River Fault
RTCuster County Idaho
 Butte County Idaho
SNE central Idaho. Indexed with counties as applicable. Added to Thesaurus in 1989.
Lost River Range  search
BTUnited States
 .Idaho
 ..Lost River Range
NTBorah Peak
RTCuster County Idaho
 Butte County Idaho
SNE central Idaho, in Butte and Custer counties. Indexed with counties as applicable. Added to Thesaurus in 1989.
Lost Soldier Field  search
BTUnited States
 .Wyoming
 ..Lost Soldier Field
RToil and gas fields
 Fremont County Wyoming
 Carbon County Wyoming
 Sweetwater County Wyoming
SNIndexed with counties as applicable. Added to Thesaurus in 1989.
lostei  search
NTAmiidae
 Halecostomi
Lot France  search
BTEurope
 .Western Europe
 ..France
 ...Lot France
RTQuercy
SNDepartment in S central France.
Lot-et-Garonne France  search
BTEurope
 .Western Europe
 ..France
 ...Lot-et-Garonne France
NTDurance France
SNDepartment in SW France.
Lotbiniere County Quebec  search
BTCanada
 .Eastern Canada
 ..Quebec
 ...Lotbiniere County Quebec
Lotharingian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Jurassic
 ....Lower Jurassic
 .....Lotharingian
SNEurope. Above Sinemurian, below Pliensbachian.
Lothian region Scotland  search
BTEurope
 .Western Europe
 ..United Kingdom
 ...Great Britain
 ....Scotland
 .....Lothian region Scotland
NTEast Lothian Scotland
 Edinburgh Scotland
RTTyne River
 Midlothian Scotland
SNAdministrative region in SE Scotland created from East Lothian (formerly Haddingtonshire), and parts of West Lothian and Midlothian in 1975.
Louann  search
Louann Salt  search
UFLouann Tongue
RTTriassic
 Jurassic
 Permian
 Louisiana
 Texas
 Arkansas
 Permian-Triassic boundary
 salt tectonics
SNIndexed with age or ages as applicable. Added to Thesaurus in 1985.
Louann Tongue  search
USELouann Salt
Loudon County Tennessee  search
BTUnited States
 .Tennessee
 ..Loudon County Tennessee
Loudoun County Virginia  search
BTUnited States
 .Virginia
 ..Loudoun County Virginia
Louisa County Iowa  search
BTUnited States
 .Iowa
 ..Louisa County Iowa
Louisa County Virginia  search
BTUnited States
 .Virginia
 ..Louisa County Virginia
Louisiade Archipelago  search
BTAustralasia
 .Papua New Guinea
 ..Louisiade Archipelago
RTWest Pacific Ocean Islands
SNIsland group in Solomon Sea SE of E tip of New Guinea.
Louisiana  search
BTUnited States
 .Louisiana
NTAcadia Parish Louisiana
 Allen Parish Louisiana
 Ascension Parish Louisiana
 Assumption Parish Louisiana
 Atchafalaya Bay
 Atchafalaya River
 Avoyelles Parish Louisiana
 Barataria Bay
 Beauregard Parish Louisiana
 Bienville Parish Louisiana
 Bossier Parish Louisiana
 Caddo Parish Louisiana
 Calcasieu Parish Louisiana
 Calcasieu River
 Caldwell Parish Louisiana
 Cameron Parish Louisiana
 Catahoula Parish Louisiana
 Claiborne Parish Louisiana
 Concordia Parish Louisiana
 De Soto Parish Louisiana
 East Baton Rouge Parish Louisiana
 East Carroll Parish Louisiana
 East Feliciana Parish Louisiana
 Evangeline Parish Louisiana
 Franklin Parish Louisiana
 Grant Parish Louisiana
 Iberia Parish Louisiana
 Iberville Parish Louisiana
 Jackson Parish Louisiana
 Jefferson Davis Parish Louisiana
 Jefferson Parish Louisiana
 La Salle Parish Louisiana
 Lafayette Parish Louisiana
 Lafourche Parish Louisiana
 Lake Pontchartrain
 Lincoln Parish Louisiana
 Livingston Parish Louisiana
 Madison Parish Louisiana
 Mississippi Delta
 Morehouse Parish Louisiana
 Natchitoches Parish Louisiana
 Orleans Parish Louisiana
 Ouachita Parish Louisiana
 Plaquemines Parish Louisiana
 Pointe Coupee Parish Louisiana
 Rapides Parish Louisiana
 Red River Parish Louisiana
 Richland Parish Louisiana
 Sabine Parish Louisiana
 Saint Bernard Parish Louisiana
 Saint Charles Parish Louisiana
 Saint Helena Parish Louisiana
 Saint James Parish Louisiana
 Saint John the Baptist Parish Louisiana
 Saint Landry Parish Louisiana
 Saint Martin Parish Louisiana
 Saint Mary Parish Louisiana
 Saint Tammany Parish Louisiana
 Tangipahoa Parish Louisiana
 Tensas Parish Louisiana
 Terrebonne Parish Louisiana
 Union Parish Louisiana
 Vacherie Dome
 Vermilion Parish Louisiana
 Vernon Parish Louisiana
 Washington Parish Louisiana
 Webster Parish Louisiana
 West Baton Rouge Parish Louisiana
 West Carroll Parish Louisiana
 West Feliciana Parish Louisiana
 Winn Parish Louisiana
 Winnfield salt dome
RTByram Formation
 Catahoula Formation
 Amite River
 Anahuac Formation
 Austin Chalk
 Avery Island
 Beaumont Clay
 Bossier Formation
 Buckner Formation
 Carrizo Sand
 Claiborne Group
 Chicot Aquifer
 Citronelle Formation
 Cockfield Formation
 Cook Mountain Formation
 Cott
Louisville Kentucky  search
BTUnited States
 .Kentucky
 ..Jefferson County Kentucky
 ...Louisville Kentucky
SNCity on the Ohio River in N Kentucky.
Louisville Ridge  search
BTPacific Ocean
 .South Pacific
 ..Southeast Pacific
 ...Louisville Ridge
SNSE Pacific. This term has multiple hierarchies. Added to Thesaurus in 1989.
Loup County Nebraska  search
BTUnited States
 .Nebraska
 ..Loup County Nebraska
Loup Fork Gro  search
Loup Fork Group  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Loup Fork Group
RTPliocene
 Pleistocene
 Miocene
 New Mexico
 Wyoming
 Colorado
 Nebraska
 Texas
 Kansas
 South Dakota
SNMiocene, Pliocene, and Pleistocene(?). Indexed with ages as applicable.
Lourdes France  search
BTutes-Pyrenees France
 .Lourdes France
SNTown in SW France.
Louvain Belgium  search
BTEurope
 .Western Europe
 ..Belgium
 ...Brabant Belgium
 ....Louvain Belgium
UFLeuven Belgium
SNCity E of Brussels in central Belgium.
Love County Oklahoma  search
BTUnited States
 .Oklahoma
 ..Love County Oklahoma
Love w  search
Love waves  search
BTelastic waves
 .seismic waves
 ..surface waves
 ...Love waves
UFQ waves
RTseismology
 waves
 Lg-waves
Loveland Colorado  search
BTUnited States
 .Colorado
 ..Larimer County Colorado
 ...Loveland Colorado
SNCity in N Colorado.
Loveland Loess  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Quarternary
 ....Pleistocene
 .....Loveland Loess
RTIowa
 Kentucky
 Colorado
 Illinois
 Indiana
 Mississippi
 Nebraska
 Kansas
 Tennessee
 South Dakota
 Arkansas
SNMay be in Sanborn Group. Arkansas, Colorado, Illinois, Indiana, Iowa, Kansas, Kentucky, Mississippi, Nebraska, South Dakota, and Tennessee. Added to Thesaurus in 1995.
Lovelock Nevada  search
BTUnited States
 .Nevada
 ..Pershing County Nevada
 ...Lovelock Nevada
SNCity in NW Nevada.
Loving County Texas  search
BTUnited States
 .Texas
 ..Loving County Texas
Lovozero Massif  search
BTCommonwealth of Independent States
 .Russian Federation
 ..Murmansk Russian Federation
 ...Lovozero Massif
RTKola Peninsula
SNMurmansk Oblast on the Kola Peninsula in NW European Russian Federation. This term has multiple hierarchies.
Lovozero Russian Federation  search
BTCommonwealth of Independent States
 .Russian Federation
 ..Murmansk Russian Federation
 ...Lovozero Russian Federation
RTIlimaussaq
SNVillage in Murmansk Oblast on Kola Peninsula in NW Russian Federation. Before 1993, Lovozero Russian Republic was also used. This term has multiple hierarchies.
Low Archipelago  search
USETuamotu Islands
Low Jesenik Mountains  search
USENizky Jezenik Mountains
low pressure  search
BTpressure
 .low pressure
RTmetamorphism
 high pressure
 phase equilibria
low quartz  search
USEalpha quartz
low stands  search
USElowstands
Low Tatra  search
USELow Tatra Mountains
Low Tatra Mountains  search
BTEurope
 .Central Europe
 ..Slovakia
 ...Slovakian Carpathians
 ....Low Tatra Mountains
UFLow Tatra
 Low Tatras
 Lower Tatra
 Nizke Tatra
RTTatra Mountains
SNSection of the Carpathians parallel to and S of the Tatra Mountains in N central Slovakia. This term has multiple hierarchies.
Low Tatras  search
USELow Tatra Mountains
low temperature  search
BTtemperature
 .low temperature
UFlow-temperature analysis
RTmetamorphism
 phase equilibria
low velocity zones  search
USElow-velocity zones
low water  search
UFlow-water levels
RTground water
 water
 hydrology
 rivers and streams
 levels
 drawdown
 tides
 water content
SNAdded to Thesaurus in 1981.
low-angle faults  search
BTfaults
 .low-angle faults
RThigh-angle faults
SNBefore 1978, search faults AND low-angle.
low-energy environment  search
RTdepositional environment
 high-energy environment
 sedimentation
SNBefore 1978, search low-energy.
low-grade  search
SNA valid term through 1977. After 1977, use low-grade metamorphism.
low-grade metamorphism  search
BTmetamorphism
 .low-grade metamorphism
RTgrade
 epizonal metamorphism
SNBefore 1978, search low-grade AND metamorphism.
low-level geothermal energy  search
RTgeothermal energy
SNAdded to Thesaurus in 1985.
low-level waste  search
RThigh-level waste
 radioactive waste
 underground storage
 waste disposal
SNAdded to Thesaurus in 1985.
low-temperature analysis  search
USElow temperature
low-velocity layer  search
SNAs of 1981, no longer a valid term for GeoRef. Use low-velocity zones.
low-velocity layers  search
USElow-velocity zones
low-velocity zones  search
UFlow velocity zones
 low-velocity layers
 zones, low-velocity
RTmantle
 seismology
 crust
 velocity structure
SNGeneral term, i.e. applicable to crust, mantle, etc.
low-water levels  search
USElow water
lower Archean  search
BTChronostratigraphic Units
 .Precambrian
 ..Archean
 ...lower Archean
SNAdded to Thesaurus in 1985.
Lower Austria  search
BTEurope
 .Central Europe
 ..Austria
 ...Lower Austria
NTBad Deutsch Altenburg Austria
 Eichkogel
 Kamp Valley
 Krems Austria
 Schwechat Valley
 Spitz Austria
 Vienna Austria
 Wiener Wald
RTWechsel
 Enns Valley
 North Austrian Crystallines
 Semmering
 Ybbsitz Meteorite
SNState in NE Austria.
lower Badenian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Neogene
 ....Miocene
 .....Badenian
 ......lower Badenian
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Neogene
 ....Miocene
 .....lower Miocene
 ......lower Badenian
SNThis term has multiple hierarchies.
lower boundary  search
SNA valid general term through 1976. For stratigraphic meaning use stratigraphic boundary; for biostratigraphy, see first occurrence.
Lower Cambrian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Cambrian
 ....Lower Cambrian
NTAldanian
 Antietam Formation
 Atdabanian
 Chilhowee Group
 Dunham Dolomite
 Gog Group
 Harlech Stage
 Kinzers Formation
 Murphy Marble
 Pinney Hollow Formation
 Rome Formation
 Shady Dolomite
 Tommotian
 Usa Series
 Yudoma Series
 Zabriskie Quartzite
RTMiddle Cambrian
 Upper Cambrian
 Cheshire Formation
 Boston Bay Group
 Cambridge Argillite
 Roxbury Conglomerate
 Porsanger Dolomite Formation
 Lancara Formation
 Moty Formation
 Pinnacle Formation
 Puncoviscana Formation
 Underhill Formation
 Wood Canyon Formation
 Y
Lower Carboniferous  search
USEDinantian
lower Cenomanian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Upper Cretaceous
 .....Cenomanian
 ......lower Cenomanian
SNAdded to Thesaurus in 1985.
lower Cenozoic  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...lower Cenozoic
RTSkagit Gneiss
Lower Cretaceous  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Lower Cretaceous
NTBerriasian
 Valanginian
 Hauterivian
 Barremian
 Aptian
 Albian
 Antlers Sands
 Areado Formation
 Baquero Formation
 Bear River Formation
 Bisbee Group
 Blackleaf Formation
 Blake-Bahama Formation
 Bluesky Formation
 Burro Canyon Formation
 Cadomin Formation
 Cedar Mountain Formation
 Cheyenne Sandstone
 Christopher Formation
 Clearwater Formation
 Cloverly Formation
 Comanche Peak Limestone
 Edwards Formation
 Fall River Formation
 Fredericksburg Group
 Gargasian
 Gault Clay
 Georgetown Formation
 Gething Formation
 Glen Rose Formation
 Hosston Formation
 Inyan Kara Group
 Isachsen Formation
 Kiowa Formation
 Kootenay Formation
 Lakota Formation
 Mannville Group
 McMurray Formation
 Mentor Beds
 Mesa Rica Sandstone
 Moosebar Formation
 Mowry Shale
 Muddy Sandstone
 Mural Limestone
 Neocomian
 Newcastle Sandstone
 Paluxy Formation
 Pasayten Group
 Pearsall Formation
 Pebble Shale
 Purbeckian
 Rodessa Formation
 Skull Creek Shale
 Sligo Formation
 Speeton Clay
 Spirit River Formation
 Sunniland Limestone
 Thamama Group
 Torok Formation
 Travis Peak Formation
 Trinity Group
 Urgonian
 Wealden
 Zubair Formation
RTUpper Cretaceous
 Comanchean
 Kirkwood Formation
 upper Gondwana System
 Toro Formation
 Middle Cretaceous
 Washita Group
 Nevadan Orogeny
 Nicoya Complex
 J Sandstone
 Gates Formation
 Vraconian
lower crust  search
BTcrust
 .lower crust
RTupper mantle
 asthenosphere
 lithosphere
 basaltic layer
 granitic layer
 middle crust
 crustal thickening
 upper crust
Lower Devonian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Devonian
 ....Lower Devonian
NTLochkovian
 Pragian
 Emsian
 Battery Point Formation
 Coeymans Formation
 Dittonian
 Gedinnian
 Helderberg Group
 Helderbergian
 Littleton Formation
 Manlius Formation
 Matagamon Sandstone
 Oriskany Sandstone
 Seboomook Formation
 Siegenian
 York River Formation
RTMiddle Devonian
 Upper Devonian
 Keyser Limestone
 Read Bay Formation
 Downtonian
 Hidden Valley Dolomite
 Tippecanoe Sequence
 Road River Formation
 Rondout Formation
 Ross Formation
 Zlichovian
lower Eocene  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Eocene
 .....lower Eocene
NTAger Formation
 Aquia Formation
 Calvert Bluff Formation
 Cuisian
 Hatchetigbee Formation
 Misoa Formation
 Nanafalia Formation
 Sparnacian
 Thebes Formation
 Wasatchian
 Willwood Formation
 Wind River Formation
 Ypresian
RTupper Eocene
 middle Eocene
 Santa Susana Formation
 Imo Shale
 Deccan Traps
 Intertrappean Beds
 Ewekoro Formation
 Sinjar Formation
 San Jose Formation
lower Gondwana  search
USElower Gondwana System
lower Gondwana System  search
BTGondwana System
 .lower Gondwana System
UFlower Gondwana
RTMesozoic
 Triassic
 Paleozoic
 Carboniferous
 Permian
 Gondwana
 upper Gondwana System
 Upper Carboniferous
SNPeninsular India. Indexed with age as applicable. Added to Thesaurus in 1985.
Lower Greensand  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Lower Greensand
RTEngland
 United Kingdom
SNAptian and lower Albian.
lower Holocene  search
BTlocene
 .lower Holocene
RTBaltic Glaciation
 Clovis
Lower Jurassic  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Jurassic
 ....Lower Jurassic
NTHettangian
 Sinemurian
 Pliensbachian
 Toarcian
 Carixian
 Dunlin Group
 East Berlin Formation
 Feltville Formation
 Hampden Basalt
 Holyoke Basalt
 Lotharingian
 lower Liassic
 Luxembourg Sandstone
 middle Liassic
 Nordegg Member
 Novorayskoe Formation
 Nugget Sandstone
 Portland Formation
 Sunrise Formation
 Talkeetna Formation
 upper Liassic
UFLias
 Liassic
RTMiddle Jurassic
 Upper Jurassic
 Aalenian
 Brunswick Formation
 Passaic Formation
 Elliot Formation
 Moenave Formation
 Gondwana System
 Indosinian Orogeny
 Kunga Group
lower Liassic  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Jurassic
 ....Lower Jurassic
 .....lower Liassic
NTHettangian
 Sinemurian
SNAdded to Thesaurus in 1981.
Lower Lusatia  search
BTEurope
 .Central Europe
 ..Poland
 ...Lower Lusatia
RTLusatia
SNThat part of Lusatia between the Neisse and the Bober rivers in SW Poland.
lower Maastrichtian  search
USElower Maestrichtian
lower Maestrichtian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Upper Cretaceous
 .....Senonian
 ......Maestrichtian
 .......lower Maestrichtian
UFlower Maastrichtian
lower mantle  search
lower Mesozoic  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...lower Mesozoic
RTMonashee Complex
 Shuswap Complex
lower Miocene  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Neogene
 ....Miocene
 .....lower Miocene
NTAltonian
 Aquitanian
 Awamoan
 Burdigalian
 Chipola Formation
 Eggenburgian
 Hemingfordian
 Kasauli Series
 lower Badenian
 Ottnangian
 Saucesian
 Waitemata Group
RTAnahuac Formation
 Arikaree Group
 Arikareean
 Badenian
 middle Miocene
 upper Miocene
 Grande Ronde Basalt
 John Day Formation
 Relizian
 Vaqueros Formation
Lower Mississippi Valley  search
BTUnited States
 .Mississippi Valley
 ..Lower Mississippi Valley
Lower Mississippian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Mississippian
 .....Lower Mississippian
NTChappel Limestone
 Chouteau Limestone
 Cuyahoga Formation
 Fort Payne Formation
 Joana Limestone
 Kayak Shale
 Kekiktuk Conglomerate
 Kinderhookian
 Lake Valley Formation
 Lodgepole Formation
 Osagian
 Pocono Formation
RTAntrim Shale
 Bakken Formation
 Upper Mississippian
 Catskill Formation
 Waulsortian facies
 Ellesmerian Orogeny
 Pilot Shale
 Rampart Group
 Rundle Group
 Valmeyeran
lower Neogene  search
USEMiocene
lower Oligocene  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Oligocene
 .....lower Oligocene
NTRupelian
 Sannoisian
 Stampian
RTupper Oligocene
 White River Group
 Brule Formation
 middle Oligocene
 Chadron Formation
Lower Ordovician  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Ordovician
 ....Lower Ordovician
NTTremadocian
 Floian
 Arenigian
 Beekmantown Group
 Canadian Series
 El Paso Group
 Ellenburger Group
 Fillmore Formation
 Kindblade Formation
 Kingsport Formation
 Manitou Formation
 Mascot Dolomite
 Oneota Dolomite
 Prairie du Chien Group
 Saint George Group
 Shakopee Formation
 Smithville Formation
RTMiddle Ordovician
 Upper Ordovician
 Pacoota Sandstone
 Arbuckle Group
 San Juan Formation
 Rose Run Sandstone
 Knox Group
 Deadwood Formation
lower Paleocene  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Paleocene
 .....lower Paleocene
NTDanian
 K-T boundary
 Puercan
 Torrejonian
RTDifunta Group
 upper Paleocene
lower Paleogene  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....lower Paleogene
RTPaleocene
 Eocene
SNAdded to Thesaurus in 1985.
lower Paleozoic  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...lower Paleozoic
NTAshe Formation
 Bay of Islands Ophiolite
 Berwick Formation
 Chopawamsic Formation
 Delamerian Orogeny
 Elberton Granite
 Glenarm Series
 Henderson Gneiss
 Pacoota Sandstone
 Penobscot Formation
 Rose Run Sandstone
 Wilmington Complex
RTFamatina System
 Damara Orogeny
 Wissahickon Formation
 Ocoee Supergroup
 Sparagmite Group
 Tallulah Falls Formation
Lower Peninsula, Michigan  search
USEMichigan Lower Peninsula
Lower Pennsylvanian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Pennsylvanian
 .....Lower Pennsylvanian
NTCaseyville Formation
 Crab Orchard Mountains Group
 Gizzard Group
 Haymond Formation
 Lee Formation
 Morrowan
 New River Formation
 Pocahontas Formation
RTMiddle Pennsylvanian
 Upper Pennsylvanian
 Wahoo Limestone
 Manning Canyon Shale
Lower Permian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Permian
 ....Lower Permian
NTAbo Formation
 Artinskian
 Asselian
 Autunian
 Barakar Stage
 Cherry Canyon Formation
 Leman Sandstone Formation
 Leonardian
 Opeche Shale
 Qixia Formation
 Sakmarian
 Wichita Group
 Wolfcampian
RTGuadalupian
 Kungurian
 Guandacol Formation
 Rotliegendes
 San Gregorio Formation
 Upper Permian
 Middle Permian
 Bird Spring Formation
 Itarare Subgroup
 Laborcita Formation
 Oquirrh Formation
 Pictou Group
 Stockton Formation
 Tensleep Sandstone
 Tubarao Group
 Wild C
Lower Pleistocene  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Quarternary
 ....Pleistocene
 .....Lower Pleistocene
NTAftonian
 Calabrian
 Danube Stade
 Jaramillo Subchron
 Kansan
 Nebraskan
 Olduvai Subchron
 Villafranchian
 Waccamaw Formation
RTUpper Pleistocene
 Matuyama Chron
 Uonuma Group
 Wildcat Group
lower Pliocene  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Neogene
 ....Pliocene
 .....lower Pliocene
NTEllensburg Formation
 Gilbert Chron
 Plaisancian
 Tabianian
RTupper Pliocene
 middle Pliocene
 Capistrano Formation
 Yakima Basalt
 Hemphillian
 Pannonian
 Ridge Route Formation
lower Precambrian  search
USEArchean
lower Proterozoic  search
USEPaleoproterozoic
lower Quaternary  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Quaternary
 ....lower Quaternary
Lower Rhine Basin  search
BTEurope
 .Lower Rhine Basin
RTGermany
 Netherlands
 Rhine Basin
 Rhine Valley
SNThat section of the Rhine Basin between Bonn and the North Sea; in the Netherlands it includes the basins of the Lower Rhine, Lek, and Waal rivers. Also search Lower Rhine. Indexed with countries as applicable.
Lower Rhine Graben  search
BTEurope
 .Central Europe
 ..Rhine Graben
 ...Lower Rhine Graben
Lower Saxony Germany  search
BTEurope
 .Central Europe
 ..Germany
 ...Lower Saxony Germany
NTAsse Mine
 Bad Pyrmont Germany
 Bramsche Germany
 Bremen Germany
 Brunswick Germany
 East Frisian Islands
 Eilenriede
 Emsland
 Gehrden Germany
 Gorleben
 Gottingen Germany
 Hanover Germany
 Helmstedt Germany
 Hildesheim Germany
 Konrad Mine
 Leine Valley
 Osnabruck Germany
 Rammelsberg
 Weser-Ems
RTAlster River
 Hamburg Germany
 North German Plain
 Weser River
 Harz Mountains
 Ems River
 Harz Foreland
 Harz region
 Jade Bay
 Teutoburg Forest
 Westphalia
SNState in NW Germany.
Lower Silesia  search
BTEurope
 .Central Europe
 ..Poland
 ...Lower Silesia
RTIzera Mountains
 Snieznik
 Silesia
 Silesian coal basin
 Polkowice Poland
 Strzegom-Sobotka Massif
 Upper Silesia
SNMost of former German Silesia which became part of Poland following World War II. It lies on both sides of the upper Oder River centering on Wroclaw with Czech Republic and the Neisse River constituting the SE and E borders respectively.
Lower Silurian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Silurian
 ....Lower Silurian
NTAlexandrian
 Brassfield Formation
 Clough Formation
 Grimsby Sandstone
 Llandoverian
 Medina Formation
 Tuscarora Formation
 Wenlockian
 Whirlpool Sandstone
RTEllis Bay Formation
 Upper Silurian
 Middle Silurian
 Matapedia Group
Lower Tatra  search
USELow Tatra Mountains
lower Tertiary  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Tertiary
 ....lower Tertiary
NTKiev Member
 Taishu Group
RTPaleogene
 upper Tertiary
 Bauru Formation
 Dakhla Shale
 middle Tertiary
lower Toarcian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Jurassic
 ....Lower Jurassic
 .....Toarcian
 ......lower Toarcian
SNAdded to Thesaurus in 1995.
Lower Triassic  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Triassic
 ....Lower Triassic
NTIndunian
 Olenekian
 Bunter
 Dinwoody Formation
 Panchet Series
 Permian-Triassic boundary
 Scythian
 Serebryanka Formation
 Smithian
 Spathian
 Thaynes Formation
 Werfenian
RTMiddle Triassic
 Upper Triassic
 Hercynian Orogeny
 Cordevolian
 Goose Egg Formation
 Ivishak Formation
 Sadlerochit Group
Lower Tunguska River  search
BTCommonwealth of Independent States
 .Russian Federation
 ..Lower Tunguska River
BTAsia
 .Lower Tunguska River
RTTunguska
 Tunguska River
SNRises in N central Irkutsk Oblast and flows N crossing into Evenk National Okrug then W into the Yenisei River at Turukhansk. This term has multiple hierarchies.
lower Turonian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Upper Cretaceous
 .....Turonian
 ......lower Turonian
SNAdded to Thesaurus in 1989.
Lower Zaire Congo Democratic Republic  search
BTAfrica
 .Central Africa
 ..Congo Democratic Republic
 ...Lower Zaire Congo Democratic Republic
NTMatadi Congo Democratic Republic
UFBas-Zaire Congo Democratic Republic
RTCongo River
SNThe province of Bas-Zaire in W. Before 1998, Lower Zaire was also used.
Lowicz Poland  search
BTEurope
 .Central Europe
 ..Poland
 ...Lowicz Poland
SNTown in Skierniewice Province, central Poland.
lowlands  search
USEplains
Lowndes County Alabama  search
BTUnited States
 .Alabama
 ..Lowndes County Alabama
SNS Central Alabama.
Lowndes County Georgia  search
BTUnited States
 .Georgia
 ..Lowndes County Georgia
Lowndes County Mississippi  search
BTUnited States
 .Mississippi
 ..Lowndes County Mississippi
NTColumbus Air Force Base
SNNE Mississippi.
lowstands  search
UFlow stands
RTlacustrine environment
 levels
 sea-level changes
 sequence stratigraphy
 emergent coastlines
 regression
Loxoconcha  search
BTInvertebrata
 .Arthropoda
 ..Mandibulata
 ...Crustacea
 ....Ostracoda
 .....Podocopida
 ......Cytherocopina
 .......Cytheracea
 ........Loxoconcha
SNThis term has multiple hierarchies.
Loyalty Islands  search
BTWest Pacific Ocean Islands
 .Loyalty Islands
SNIsland group 60 miles E of New Caledonia belonging to France.
Lozere France  search
BTEurope
 .Western Europe
 ..France
 ...Lozere France
RTAigoual Massif
SNDepartment in S France.
Lr  search
USElawrencium
Lu  search
USElutetium
Lu/Hf  search
UFHf/Lu
RTabsolute age
 isotope ratios
 hafnium
 lutetium
SNIsotopic ratio used in age determination.
Luanda Angola  search
BTAfrica
 .Central Africa
 ..Angola
 ...Luanda Angola
UFLoanda Angola
SNDistrict including the city in NW Angola.
Lubbock County Texas  search
BTUnited States
 .Texas
 ..Lubbock County Texas
NTLubbock Lake
 Lubbock Texas
SNNW Texas.
Lubbock Lake  search
BTUnited States
 .Texas
 ..Lubbock County Texas
 ...Lubbock Lake
RTarchaeology
SNArchaeological site in W Texas. Added to Thesaurus in 1989.
Lubbock Texas  search
BTUnited States
 .Texas
 ..Lubbock County Texas
 ...Lubbock Texas
SNCity in NW Texas.
Luben Poland  search
USELubin Poland
Lubin Legnicki  search
BTEurope
 .Central Europe
 ..Poland
 ...Lubin Legnicki
RTLubin Poland
SNRegion in and around cities of Lubin and Legnica in SW Poland.
Lubin Poland  search
BTEurope
 .Central Europe
 ..Poland
 ...Lubin Poland
UFLuben Poland
RTLubin Legnicki
SNCity in central Legnica, SW Poland.
Lublin Poland  search
BTEurope
 .Central Europe
 ..Poland
 ...Lublin Poland
NTLublin Upland
 Lukow Poland
SNProvince and city in E Poland.
Lublin Upland  search
BTEurope
 .Central Europe
 ..Poland
 ...Lublin Poland
 ....Lublin Upland
SNSW Lublin.
Lucania  search
BTEurope
 .Southern Europe
 ..Italy
 ...Lucania
RTBasilicata Italy
 Irpinia earthquake 1980
 Campania Italy
 Salerno Italy
SNAncient district in S including Basilicata autonomous region and part of Salerno Province of Campania. Indexed with autonomous regions as applicable.
Lucas County Iowa  search
BTUnited States
 .Iowa
 ..Lucas County Iowa
SNS Iowa.
Lucas County Ohio  search
BTUnited States
 .Ohio
 ..Lucas County Ohio
NTToledo Ohio
RTOttawa River
SNNW Ohio.
Lucas Formation  search
RTCretaceous
 Cuba
 Detroit River Group
 Michigan
 Middle Devonian
 Ohio
 Ontario
SNIn Detroit River Group. Ohio, SE Michigan and Ontario. Includes Richfield Member. Also a Cretaceous formation in Cuba. Indexed with ages as applicable. Added to Thesaurus in 1989.
Lucca Italy  search
BTEurope
 .Southern Europe
 ..Italy
 ...Tuscany Italy
 ....Lucca Italy
SNCity and province in central Italy.
Luce County Michigan  search
BTUnited States
 .Michigan
 ..Michigan Upper Peninsula
 ...Luce County Michigan
Lucern Switzerland  search
USELucerne Switzerland
Lucerne Switzerland  search
BTEurope
 .Central Europe
 ..Switzerland
 ...Lucerne Switzerland
UFLucern Switzerland
SNCanton in N central Switzerland. Also a city.
Lucinidae  search
BTInvertebrata
 .Mollusca
 ..Bivalvia
 ...Lucinidae
SNFamily.
Luderitz Namibia  search
BTAfrica
 .Southern Africa
 ..Namibia
 ...Luderitz Namibia
SNTown in SW Namibia. Formerly Angra Pequena.
Ludfordian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Silurian
 ....Ludlow
 .....Ludfordian
Ludian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Eocene
 .....upper Eocene
 ......Ludian
RTPriabonian
SNEurope. Above Bartonian, below Tongrian (Oligocene).
Ludlovian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Silurian
 ....Upper Silurian
 .....Ludlovian
SNEurope. Above Wenlockian, below Gedinnian (Devonian).
Ludlow  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Silurian
 ....Ludlow
NTGorstian
 Ludfordian
Ludlow Member  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Paleocene
 .....Ludlow Member
RTMontana
 North Dakota
 South Dakota
 Fort Union Formation
SNIn Fort Union Formation. NW and N South Dakota, NE Montana and SW North Dakota. Added to Thesaurus in 1989.
Ludlowville Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Devonian
 ....Middle Devonian
 .....Ludlowville Formation
RTNew York
 Hamilton Group
SNIn Hamilton Group. W and central New York. Includes Ledyard Shale Member; Wanakah Member. Added to Thesaurus in 1989.
ludwigite  search
BTborates
 .ludwigite
Lufeng China  search
BTAsia
 .Far East
 ..China
 ...Yunnan China
 ....Lufeng China
SNTown in central Yunnan, SW China.
Lugo Spain  search
BTEurope
 .Southern Europe
 ..Iberian Peninsula
 ...Spain
 ....Galicia Spain
 .....Lugo Spain
SNProvince in NW Spain.
Luisian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Neogene
 ....Miocene
 .....middle Miocene
 ......Luisian
SNNorth America. Middle Miocene, above Relizian and below Mohnian. Added to Thesaurus in 1985.
lujavrite  search
BTigneous rocks
 .plutonic rocks
 ..syenites
 ...lujavrite
RTnepheline syenite
Lukov Poland  search
USELukow Poland
Lukow Poland  search
BTEurope
 .Central Europe
 ..Poland
 ...Lublin Poland
 ....Lukow Poland
UFLukov Poland
SNTown in E Poland.
Lukuga River valley  search
BTAfrica
 .Central Africa
 ..Congo Democratic Republic
 ...Shaba Congo Democratic Republic
 ....Lukuga River valley
SNE Congo Democratic Republic.
luminance  search
USEbrightness
luminescence  search
UFphosphorescence
RTgeochemistry
 Moon
 brightness
 cathodoluminescence
 electromagnetic radiation
 fluorescence
 photochemistry
 thermoluminescence
 X-ray fluorescence
 Fraunhofer line discriminators
luminescence analysis  search
USEfluorimetry
Lumpkin County Georgia  search
BTUnited States
 .Georgia
 ..Lumpkin County Georgia
Luna 16  search
BTLuna Program
 .Luna 16
RTMoon
 remote sensing
Luna 20  search
BTLuna Program
 .Luna 20
RTMoon
 remote sensing
Luna 24  search
BTLuna Program
 .Luna 24
RTMoon
 remote sensing
SNAdded to Thesaurus in 1981.
Luna 9  search
BTLuna Program
 .Luna 9
RTMoon
 remote sensing
SNAdded to Thesaurus in 1989.
Luna County New Mexico  search
BTUnited States
 .New Mexico
 ..Luna County New Mexico
NTFlorida Mountains
SNSW New Mexico.
Luna Program  search
NTLuna 16
 Luna 20
 Luna 24
 Luna 9
RTextraterrestrial geology
 Moon
 planetology
 remote sensing
SNAdded to Thesaurus in 1981.
Lunae Planum  search
BTMars
 .Lunae Planum
RTKasei Vallis
SNLarge plateau on Mars. Added to Thesaurus in 1985.
lunar bases  search
RTexploration
 extraterrestrial geology
 landing sites
 Moon
 observations
SNAdded to Thesaurus in 1989.
lunar breccia  search
RTbreccia
 lunar samples
 Moon
SNBefore 1981, also search Moon AND breccia. Added to Thesaurus in 1981.
lunar craters  search
RTcraters
 Moon
 wrinkle ridges
SNBefore 1981, search Moon AND craters. Added to Thesaurus in 1981.
lunar crust  search
RTcrust
 lunar samples
 Moon
SNBefore 1981, also search Moon AND crust. Added to Thesaurus in 1981.
lunar highlands  search
RThighlands
 Moon
 wrinkle ridges
SNAlso search highlands AND Moon. Added to Thesaurus in 1993.
lunar interior  search
RTinterior
 Moon
 planetary interiors
SNBefore 1981, also search Moon AND interior. Added to Thesaurus in 1981.
lunar laser ranging  search
RTgeodesy
 geophysical methods
 geophysical surveys
 laser methods
 laser ranging
 Moon
 remote sensing
SNBefore 1993, also search laser ranging. Added to Thesaurus in 1993.
lunar mantle  search
RTmantle
 Moon
SNBefore 1981, also search Moon AND mantle. Added to Thesaurus in 1981.
lunar meteorites  search
BTmeteorites
 .stony meteorites
 ..achondrites
 ...lunar meteorites
RTMoon
 Elephant Moraine Meteorites
 Allan Hills Meteorites
 ALHA 81005
 EET 87521
 MAC 88104
 MAC 88105
 MacAlpine Hills Meteorites
 Queen Alexandra Range Meteorites
SNMeteorites which are thought to originate from the Moon. Before 1995, also search meteorites AND Moon. Also index Moon. Added to Thesaurus in 1995.
lunar rocks  search
USElunar samples
lunar samples  search
UFlunar rocks
RTMoon
 lunar breccia
 samples
 lunar soils
 lunar crust
lunar soils  search
RTfine-grained materials
 lunar samples
 Moon
 soils
SNBefore 1981, also search Moon AND soils.
Lund Sweden  search
BTEurope
 .Western Europe
 ..Scandinavia
 ...Sweden
 ....Malmohus Sweden
 .....Lund Sweden
SNCity in extreme S Sweden.
Lunenburg County Nova Scotia  search
BTCanada
 .Eastern Canada
 ..Maritime Provinces
 ...Nova Scotia
 ....Lunenburg County Nova Scotia
Lunenburg County Virginia  search
BTUnited States
 .Virginia
 ..Lunenburg County Virginia
Luning Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Triassic
 ....Upper Triassic
 .....Luning Formation
RTNevada
SNSW Nevada. Added to Thesaurus in 1985.
Luoquan Formation  search
BTChronostratigraphic Units
 .Precambrian
 ..Luoquan Formation
RTChina
 Henan China
 Sichuan China
 Shaanxi China
 Yunnan China
SNLocated in Henan, Shaanxi, Sichuan and Yunnan provinces. Added to Thesaurus in 1989.
Lupin Mine  search
BTCanada
 .Western Canada
 ..Mackenzie District Northwest Territories
 ...Lupin Mine
RTmines
 gold ores
SNGold ores. E Mackenzie District, Northwest Territories. This term has multiple hierarchies. Added to Thesaurus in 1989.
Lusaka Zambia  search
BTAfrica
 .East Africa
 ..Zambia
 ...Lusaka Zambia
SNCity in central Zambia.
Lusatia  search
BTEurope
 .Lusatia
UFLausitz
RTGermany
 Poland
 Upper Lusatia
 Lower Lusatia
SNRegion in E Germany, and in SW Poland. It comprises both Lower Lusatia and Upper Lusatia. Indexed with countries as applicable.
Lush's Bight Group  search
USELushs Bight Group
Lushs Bight Group  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Ordovician
 ....Lushs Bight Group
UFLush's Bight Group
RTNewfoundland Island
Lusitanian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Jurassic
 ....Upper Jurassic
 .....Lusitanian
RTMalm
 Rauracian
SNEurope. Above Oxfordian, below Kimmeridgian.
LUST  search
USEleaking underground storage tanks
Lut Desert  search
BTAsia
 .Middle East
 ..Iran
 ...Lut Desert
UFDasht-e-Lut Basin
 Dasht-i-Lut
SNGreat sandy and stony desert in E central Iran.
Lutetian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Eocene
 .....Lutetian
SNEurope. Above Cuisian, below Auversian.
lutetium  search
BTmetals
 .rare earths
 ..lutetium
UFLu
RTLu/Hf
Lutzow-Holm Bay  search
BTAntarctica
 .Lutzow-Holm Bay
UFLutzow-Holmbukta
RTQueen Maud Land
 East Ongul Island
 Prince Olav Coast
 Syowa Station
SNBetween Prince Olav Coast and Prince Harald Coast in Queen Maud Land of the Norwegian Sector.
Lutzow-Holmbukta  search
USELutzow-Holm Bay
Luvisols  search
BTsoils
 .Luvisols
RTsoil group
Luxembourg  search
BTEurope
 .Western Europe
 ..Luxembourg
RTArdennes
 Rhenish Schiefergebirge
 Luxembourg Sandstone
 Moselle River
 Moselle Valley
Luxembourg Belgium  search
BTEurope
 .Western Europe
 ..Belgium
 ...Luxembourg Belgium
NTBastogne Belgium
RTArdennes
SNProvince in S Belgium.
Luxembourg Sandstone  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Jurassic
 ....Lower Jurassic
 .....Luxembourg Sandstone
RTBelgium
 Luxembourg
SNHettangian and Sinemurian. Also called Hettange Sandstone or Orval Sandstone.
Luzerne County Pennsylvania  search
BTUnited States
 .Pennsylvania
 ..Luzerne County Pennsylvania
SNE central Pennsylvania.
Luzon  search
BTAsia
 .Far East
 ..Philippine Islands
 ...Luzon
NTBataan Philippine Islands
 Bondoc Peninsula
 Camarines Norte Philippine Islands
 Mayon
 Mount Pinatubo
 Taal
RTLuzon earthquake 1990
 Sierra Madre
 Zambales Ophiolite
SNNorthernmost and most important island.
Luzon earthquake 1990  search
BTearthquakes
 .Luzon earthquake 1990
UFPhilippine Islands earthquake 1990
 Phillipines earthquake 1990
RTPhilippine Islands
 Luzon
SNEpicenter in E Luzon, NE Philippine Islands. Also search Philippine earthquake 1990. Added to Thesaurus in 1995.
luzonite  search
BTsulfosalts
 .sulfantimonites
 ..luzonite
BTsulfosalts
 .sulfarsenites
 ..luzonite
RTcopper minerals
 famatinite
SNThis term has multiple hierarchies.
Lvov Basin  search
BTEurope
 .Ukraine
 ..Lvov Ukraine
 ...Lvov Basin
RTLvov-Volyn Basin
SNIn Lvov Oblast on the Polish border. This term has multiple hierarchies.
Lvov Ukraine  search
BTEurope
 .Ukraine
 ..Lvov Ukraine
NTBorislav Ukraine
 Lvov Basin
 Stebnik Ukraine
UFL'vov Ukraine
 Lwow Ukraine
RTDolina Ukraine
 Lvov-Volyn Basin
 Rozdol Ukraine
 Roztocze
 Rudki Ukraine
SNOblast including the city in W Ukraine. This term has multiple hierarchies.
Lvov-Volyn Basin  search
BTEurope
 .Ukraine
 ..Lvov-Volyn Basin
UFL'vov Volyn Basin
RTLvov Ukraine
 Lvov Basin
 Volyn Ukraine
SNIncludes parts of Lvov Oblast and adjoining Volyn Oblast along the Polish border. This term has multiple hierarchies.
Lwow Ukraine  search
USELvov Ukraine
Lyangar Uzbekistan  search
BTAsia
 .Uzbekistan
 ..Samarkand Uzbekistan
 ...Lyangar Uzbekistan
SNTown in Samarkand Oblast in S central Uzbekistan. This term has multiple hierarchies.
Lycian Taurus  search
BTAsia
 .Middle East
 ..Turkey
 ...Lycian Taurus
SNMountains in ancient district of SW Anatolia called Lycia.
Lycoming County Pennsylvania  search
BTUnited States
 .Pennsylvania
 ..Lycoming County Pennsylvania
Lycopoda  search
USELycopsida
Lycopodiales  search
USELycopsida
Lycopodium  search
BTPlantae
 .Pteridophyta
 ..Lycopsida
 ...Lycopodium
SNGenus.
Lycopodiumsporites  search
BTpalynomorphs
 .miospores
 ..Lycopodiumsporites
RTmicrofossils
SNGenus. Belongs to the family Lycopodiaceae. Indexed with microfossils if applicable.
Lycopsida  search
BTPlantae
 .Pteridophyta
 ..Lycopsida
NTLepidodendron
 Lycopodium
 Sigillaria
 Stigmaria
UFLycopoda
 Lycopodiales
RTvascular taxa
Lydonia Canyon  search
BTAtlantic Ocean
 .North Atlantic
 ..Lydonia Canyon
RTAtlantic Coastal Plain
 submarine canyons
 New England
SNSubmarine canyon in N Atlantic continental slope off New England. Added to Thesaurus in 1985.
Lyell, Charles  search
UFCharles Lyell
RTbiography
SNAdded to Thesaurus in 1985.
Lyman County South Dakota  search
BTUnited States
 .South Dakota
 ..Lyman County South Dakota
Lynchburg Formation  search
BTChronostratigraphic Units
 .Precambrian
 ..Proterozoic
 ...Neoproterozoic
 ....Lynchburg Formation
RTVirginia
 North Carolina
SNN North Carolina and Virginia. Added to Thesaurus in 1989.
Lyngen Peninsula  search
BTEurope
 .Western Europe
 ..Scandinavia
 ...Norway
 ....Troms Norway
 .....Lyngen Peninsula
SNAlong Lyngen Fjord 30 miles E of Tromso in N Norway.
Lynn County Texas  search
BTUnited States
 .Texas
 ..Lynn County Texas
Lynn Lake Manitoba  search
BTCanada
 .Western Canada
 ..Manitoba
 ...Lynn Lake Manitoba
SNTown in NW Manitoba.
Lyon County Iowa  search
BTUnited States
 .Iowa
 ..Lyon County Iowa
SNExtreme NW Iowa.
Lyon County Kansas  search
BTUnited States
 .Kansas
 ..Lyon County Kansas
NTAdmire Kansas
 Emporia Kansas
SNE central Kansas.
Lyon County Kentucky  search
BTUnited States
 .Kentucky
 ..Lyon County Kentucky
SNW Kentucky.
Lyon County Minnesota  search
BTUnited States
 .Minnesota
 ..Lyon County Minnesota
SNSW Minnesota.
Lyon County Nevada  search
BTUnited States
 .Nevada
 ..Lyon County Nevada
NTSilver City Nevada
 Yerington Nevada
RTCarson River
SNW Nevada.
Lyon France  search
USELyons France
Lyons France  search
BTEurope
 .Western Europe
 ..France
 ...Rhone France
 ....Lyons France
UFLyon France
SNCity in E central France.
Lyons Sandstone  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Permian
 ....Lyons Sandstone
RTColorado
SNIn Cassa Group. N central Colorado. Added to Thesaurus in 1985.
lysime  search
lysimet  search
lysimeters  search
RTdrainage
 ground water
 hydrochemistry
 hydrogeology
 hydrologic cycle
 hydrology
 infiltrometers
 soils
 water balance
 water regimes
SNAdded to Thesaurus in 1982.
lysoclines  search
RTcarbonate compensation depth
 solution
Lystrosaurus  search
BTSynapsida
 .Therapsida
 ..Dicynodontia
 ...Lystrosaurus
SNGenus.
Lytoceratida  search
BTInvertebrata
 .Mollusca
 ..Cephalopoda
 ...Tetrabranchiata
 ....Ammonoidea
 .....Lytoceratida
Lyublyana Slovenia  search
USELjubljana Slovenia